Designing Out-of-Equilibrium Many-Body Quantum Systems
Lead Research Organisation:
University of Strathclyde
Department Name: Physics
Abstract
Huge amounts of data are routed through the internet and are being processed by our computers and mobile phones every second. Always being connected to the internet has transformed many aspects of our lives, from the way we do our shopping to how we meet friends. The demand for further improving our ability to process data is driven by ever more devices being connected to the internet and services being moved online to improve our quality of life.
The physical principles underlying our technology to store and process data are based on our understanding of out-of-equilibrium dynamics. Better control of this physics is crucial to further shrinking electronic devices and to address the major challenge of developing energy-efficient switching and communications links. Such further progress in information processing technologies is expected to heavily rely on quantum effects like superposition and entanglement in the near future.
In addition, as the fruits of the recently initiated National Quantum Technology Programme start to become available after 2020, it will be even more important to have the knowledge in place to be able to face the next generation of technological challenges, such as the scaling up of the newly developed quantum devices. How to exploit the advantages of these increasingly complex devices in the presence of noise and decoherence is intrinsically an issue of out-of-equilibrium many-body quantum physics. It is therefore crucial to put methods in place now that will underpin the design of out-of-equilibrium quantum systems.
Our vision is to explore, understand, and design out-of-equilibrium quantum dynamics that are relevant for such future communication and quantum technologies, using quantum simulators with ultracold atomic gases in optical potentials. Ultracold gases are a unique platform in that they offer controllability and versatility in the quantum regime that is currently unparalleled by any other quantum system. We will set up and investigate ultracold atom simulations to help planning and designing out-of-equilibrium many-body quantum dynamics similarly to how wind tunnels are utilized in aerodynamics.
This project will capitalise on these capabilities by exploring three broad aspects of out-of-equilibrium dynamics that are especially relevant for future technologies: (i) switching behaviour of driven quantum systems, which could also be used to design enhanced classical information processing devices; (ii) driven quantum systems as quantum-enhanced sensors; and (iii) engineering emergent phenomena in driven quantum systems. Our activity will bind together existing internationally leading researchers within the UK on a novel common project of high scientific interest and technological relevance. This provides a unique opportunity for the UK to adopt a world-leading position in the use of quantum simulators to explore out-of-equilibrium dynamics in quantum many-body systems.
The physical principles underlying our technology to store and process data are based on our understanding of out-of-equilibrium dynamics. Better control of this physics is crucial to further shrinking electronic devices and to address the major challenge of developing energy-efficient switching and communications links. Such further progress in information processing technologies is expected to heavily rely on quantum effects like superposition and entanglement in the near future.
In addition, as the fruits of the recently initiated National Quantum Technology Programme start to become available after 2020, it will be even more important to have the knowledge in place to be able to face the next generation of technological challenges, such as the scaling up of the newly developed quantum devices. How to exploit the advantages of these increasingly complex devices in the presence of noise and decoherence is intrinsically an issue of out-of-equilibrium many-body quantum physics. It is therefore crucial to put methods in place now that will underpin the design of out-of-equilibrium quantum systems.
Our vision is to explore, understand, and design out-of-equilibrium quantum dynamics that are relevant for such future communication and quantum technologies, using quantum simulators with ultracold atomic gases in optical potentials. Ultracold gases are a unique platform in that they offer controllability and versatility in the quantum regime that is currently unparalleled by any other quantum system. We will set up and investigate ultracold atom simulations to help planning and designing out-of-equilibrium many-body quantum dynamics similarly to how wind tunnels are utilized in aerodynamics.
This project will capitalise on these capabilities by exploring three broad aspects of out-of-equilibrium dynamics that are especially relevant for future technologies: (i) switching behaviour of driven quantum systems, which could also be used to design enhanced classical information processing devices; (ii) driven quantum systems as quantum-enhanced sensors; and (iii) engineering emergent phenomena in driven quantum systems. Our activity will bind together existing internationally leading researchers within the UK on a novel common project of high scientific interest and technological relevance. This provides a unique opportunity for the UK to adopt a world-leading position in the use of quantum simulators to explore out-of-equilibrium dynamics in quantum many-body systems.
Planned Impact
The first impact of this work will be in the developing quantum technologies industry. The new understanding we generate of out-of-equilibrium dynamics will provide means towards a new generation of quantum-enhanced devices for measurement and sensing. It will also allow us to understand the further scaling up of existing devices, by accounting in new ways for decoherence and noise. This will have strong benefits on the end-users of these technologies, beginning with the National Network of Quantum Technology Hubs in this area, continuing with the National Physical Laboratory, and extending to wider industry. Our new platform for quantum simulation with these systems will provide design inputs for further future developments. We will similarly impact future generations of quantum technologies based on quantum simulation, and their possible applications in industry, through the benchmarking techniques we realise with out of equilibrium dynamics.
Our work will also help to deepen understanding of switching properties in electronic and opto-electronic systems. This could have long-term applications in a number of areas, including optimising energy consumption in computing and data centres. This will be of interest to a range of potential partners investigating new switching mechanisms and optical data transfer technologies for large data centres. This is important to large computing companies, and will connect to ongoing research in a number of existing programmes with industrial engagement, including the SU2P partnership between Stanford University and Scottish Universities.
Our further exploration of emergent properties in out-of-equilibrium dynamics is likely to generate scientific understanding that has a direct bearing on materials development. In particular, spectacular progress has recently been made in inducing superconductivity in quantum materials by optical driving, far above their usual critical temperature. By exploring the physical mechanisms leading to superconductivity using quantum simulators, we hope to understand basic design principles that later lead to advances in the control of these materials. At the same time, we will investigate the role of dissipation in quantum transport, helping us to understand fundamental limitations on energy dissipation in electronic devices.
Another important impact of this project will be in training highly-skilled researchers, especially RAs and aligned PhD students, in an interdisciplinary area. This training aspect is particularly important in light of the growing opportunities in industries related to quantum technologies.
The wider public will also benefit directly from a range of public engagement events that address the topics of our research and impact on the development of quantum technologies. Such activities will occur at both formal and informal levels with schools, science centres, museums, and other similar institutions, and include, e.g., lectures and presentations of quantum optics experiments. We are also planning to host public lectures, e.g. by inviting Nobel Laureates to speak on Quantum Physics or related topics to general audiences. This will help inform the public about the role of fundamental research in the pipeline for quantum technologies, and will help to inspire a next generation of scientists from a diverse range of backgrounds.
Our work will also help to deepen understanding of switching properties in electronic and opto-electronic systems. This could have long-term applications in a number of areas, including optimising energy consumption in computing and data centres. This will be of interest to a range of potential partners investigating new switching mechanisms and optical data transfer technologies for large data centres. This is important to large computing companies, and will connect to ongoing research in a number of existing programmes with industrial engagement, including the SU2P partnership between Stanford University and Scottish Universities.
Our further exploration of emergent properties in out-of-equilibrium dynamics is likely to generate scientific understanding that has a direct bearing on materials development. In particular, spectacular progress has recently been made in inducing superconductivity in quantum materials by optical driving, far above their usual critical temperature. By exploring the physical mechanisms leading to superconductivity using quantum simulators, we hope to understand basic design principles that later lead to advances in the control of these materials. At the same time, we will investigate the role of dissipation in quantum transport, helping us to understand fundamental limitations on energy dissipation in electronic devices.
Another important impact of this project will be in training highly-skilled researchers, especially RAs and aligned PhD students, in an interdisciplinary area. This training aspect is particularly important in light of the growing opportunities in industries related to quantum technologies.
The wider public will also benefit directly from a range of public engagement events that address the topics of our research and impact on the development of quantum technologies. Such activities will occur at both formal and informal levels with schools, science centres, museums, and other similar institutions, and include, e.g., lectures and presentations of quantum optics experiments. We are also planning to host public lectures, e.g. by inviting Nobel Laureates to speak on Quantum Physics or related topics to general audiences. This will help inform the public about the role of fundamental research in the pipeline for quantum technologies, and will help to inspire a next generation of scientists from a diverse range of backgrounds.
Publications
Al-Assam S
(2017)
The tensor network theory library
in Journal of Statistical Mechanics: Theory and Experiment
Alaeian H
(2022)
Exact multistability and dissipative time crystals in interacting fermionic lattices
in Communications Physics
Ashida Y
(2020)
Quantum Electrodynamic Control of Matter: Cavity-Enhanced Ferroelectric Phase Transition
in Physical Review X
Becher JH
(2020)
Measurement of Identical Particle Entanglement and the Influence of Antisymmetrization.
in Physical review letters
Bentsen G
(2019)
Treelike Interactions and Fast Scrambling with Cold Atoms.
in Physical review letters
Bentsen G
(2019)
Treelike interactions and fast scrambling with cold atoms
| Description | Through the Programme Grant on Designing out of equilibrium many-body quantum systems, a consortium of seven co-investigators, and over thirty postdoctoral researchers and associate PhD students across three universities developed next-generation platforms for quantum simulation - a technology that can play a similar role in the understanding and development of microscopic out-of-equilibrium dynamics that a wind tunnel plays for aerodynamics. The vision was to explore, understand, and ultimately design forms of out-of-equilibrium quantum dynamics that are relevant for future technologies, especially quantum technologies for metrology and sensing, as well as in modern materials science. Over the course of the project, we took major steps in developing new platforms in our experimental teams, while theory teams developed new protocols for benchmarking these platforms, as well as new roadmaps for exploring new scientific directions in out of equilibrium dynamics. Combined work of the theory and experimental teams identified new connections of these platforms to important topics in modern solid-state materials. A particular set of successes in this project involved new directions in out of equilibrium dynamics that were not originally foreseen. This included particularly striking examples such as the study of quasicrystals with atoms in optical potentials which has important connections to solid-state quasicrystals in bilayer structures, and the understanding of a universal equation of state for out of equilibrium dynamic in quantum gases. We also realised textbook examples related to the doping of solid state materials, exploring transitions between insulating and non-insulating states of atoms in an optical lattice (representing electrons in the solid state). Our collaborations have allowed us to identify new potential to map problems of interest beyond many-body physics onto quantum dynamics, opening potential opportunities for quantum simulation to be made useful to a broader community (also beyond fundamental science). As noted below, this is now being taken forward also in the context of quantum technologies hubs. |
| Exploitation Route | Initially, the primary impact of our work has been scientific, in the form of a better understanding of some quantum dynamics that underpin important processes across physics. Going further, these platforms will have the potential to be used in the design process for next generations of quantum technologies, to solve quantum dynamics problems relevant to quantum materials or chemistry (potentially aiding in the discovery of processes relevant to battery cathodes, catalysts, or the pharmaceutical industry), as well as to solve mathematical problems relevant to optimisation and logistics. On a technical level, the next-generation platforms we produced are now being taken forwards to a next step of development within new projects that build on the platforms developed, and on the collaborations - with a view to bridging the gap to these future applications, and to make the technologies available to a wider potential user base. Researchers from our consortium are now working to develop some of these connections together with the second phase of the UK National Quantum Technologies Hub for Computing and Simulation. We have also developed new methods to use our technologies in developing future generations of cold atoms systems for metrology and sensing. Some of our consortium members are now further developing this as part of projects in the Quantum Technologies for Fundamental Physics programme. |
| Sectors | Aerospace Defence and Marine Digital/Communication/Information Technologies (including Software) Electronics Energy Healthcare Pharmaceuticals and Medical Biotechnology Security and Diplomacy Transport |
| URL | http://desoeq.phys.strath.ac.uk |
| Description | (PASQuanS) - Programmable Atomic Large-Scale Quantum Simulation |
| Amount | € 9,257,515 (EUR) |
| Funding ID | 817482 |
| Organisation | European Commission |
| Sector | Public |
| Country | Belgium |
| Start | 09/2018 |
| End | 09/2021 |
| Description | AION: A UK Atom Interferometer Observatory and Network |
| Amount | £1,238,384 (GBP) |
| Funding ID | ST/T006579/1 |
| Organisation | Science and Technologies Facilities Council (STFC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 03/2021 |
| End | 09/2025 |
| Description | EPSRC Hub in Quantum Computing and Simulation |
| Amount | £26,338,781 (GBP) |
| Funding ID | EP/T001062/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 12/2019 |
| End | 11/2024 |
| Description | Hub for Quantum Computing via Integrated and Interconnected Implementations (QCI3) |
| Amount | £21,348,358 (GBP) |
| Funding ID | EP/Z53318X/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 12/2024 |
| End | 11/2029 |
| Description | Many-body Dynamics and Universality in Flatland (ERC Advanced Grant) |
| Amount | € 2,500,000 (EUR) |
| Funding ID | 101019302 |
| Organisation | European Research Council (ERC) |
| Sector | Public |
| Country | Belgium |
| Start | 11/2021 |
| End | 10/2026 |
| Description | Quantum Advantage in Quantitative Quantum Simulation |
| Amount | £9,319,151 (GBP) |
| Funding ID | EP/Y01510X/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 07/2024 |
| End | 08/2030 |
| Description | Quantum Simulators for Fundamental Physics |
| Amount | £670,424 (GBP) |
| Funding ID | ST/T006056/1 |
| Organisation | Science and Technologies Facilities Council (STFC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 01/2021 |
| End | 06/2025 |
| Description | Single Impurity in a Dipolar Bose-Einstein Condensate |
| Amount | £501,681 (GBP) |
| Funding ID | EP/T019913/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 09/2020 |
| End | 03/2024 |
| Description | Understanding Quantum Non-Equilibrium Matter: Many-Body Localisation versus Glasses, Theory and Experiment |
| Amount | £722,545 (GBP) |
| Funding ID | EP/R044627/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 12/2018 |
| End | 11/2023 |
| Title | Data Moiré Nonlinearities |
| Description | Data for figures in the paper. Please see ReadMe file for detailed description |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/336502 |
| Title | Data and code to generate figures for "Generating Symmetry-Protected Long-Range Entanglement (Dutta, Kuhr, Cooper)" |
| Description | Graphs for all figures are provided along with codes that implement the results described in the paper. We simulate how a spin chain subject to timed local pulses develops long-range entanglement and how timed pulses can also drive a Hubbard chain to a maximally-correlated $\eta$-pairing state. All simulations are performed using exact diagonalization in Mathematica. In Figure 2 we obtain how the central-spin magnetization and the bipartite entanglement in an XY spin-1/2 chain evolves in time. We also obtain the distribution among symmetry sectors with different levels of entanglement and concurrence matrices that show the build-up of long-range Bell pairs. In Figure 3 we show how the result generalizes to larger systems and how the entanglement and preparation time scale with the system size. We also show how the protocol is not sensitive to random timing error of the pulses. In Figure 4 we calculate how the fidelity is affected by several types of imperfections, showing it is relatively robust. In Figure 7 we compute experimentally measurable spin-spin correlations at different stages of the protocol. In Figure 8 we calculate level statistics in the presence of integrability breaking and show that the scaling of entanglement and preparation time are largely unaffected. In Figure 5 we illustrate the protocol for $\eta$-pairing by simulating the evolution of a strongly-interacting, finite Hubbard chain. In Figure 6 we compute signatures of $eta$ pairing, including the average number of $\eta$ pairs, their momentum distribution, and the overlap with the maximally-correlated state as a function of system size. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2024 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/363647 |
| Title | Data for "Elliptic flow in a strongly interacting normal Bose gas" |
| Description | Data used to produce all the figures in the paper and the details of the experimental sequence for taking it. Folders named "Eta***" contain information about the 3 panels in Figure 2, and the folder "Energy transfer..." about Figure 3. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2018 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/277783 |
| Title | Data for: "Adiabatic preparation of entangled, magnetically ordered states with cold bosons in optical lattices" |
| Description | This dataset contains the list of all figures used in this publication together with references to corresponding source and data files: *.m --- MATLAB source file (version R2018b) *.mat --- MATLAB data file (version R2018b) *.txt --- Text files for clarifications Work at the University of Strathclyde was supported by the EPSRC Programme Grant DesOEQ (EP/P009565/1), by the EOARD via AFOSR grant number FA9550-18-1-0064, and by AFOSR MURI FA9550-14-1-0035. Numerical calculations here utilized the ARCHIEWeSt High Performance Computer. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2020 |
| Provided To Others? | Yes |
| URL | https://pureportal.strath.ac.uk/en/datasets/e7a9dd9b-3865-4207-937d-0c5966d0741b |
| Title | Data for: "Controlling quantum transport via dissipation engineering" |
| Description | This dataset contains all the source files used to created the figures of the article - F. Damanet, E. Mascarenhas, D. Pekker, and A. J. Daley, "Controlling quantum transport via dissipation engineering", to appear in Phys. Rev. Lett. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2019 |
| Provided To Others? | Yes |
| Title | Data for: "Dissipative dynamics and cooling rates of trapped impurity atoms immersed in a reservoir gas" |
| Description | The folder "data" uploaded contains the data produced during this project, used in the figures of the relative manuscript. The folder "code_plot_data" contains the .nb files that just need to be run in Mathematica to reproduce the relative figures. Please not that the data and the .nb files must be located in the same folder in order to avoid errors in the code due to wrong path location. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2020 |
| Provided To Others? | Yes |
| URL | https://pureportal.strath.ac.uk/en/datasets/8d1dfda0-598d-4838-8d5b-3cfae400781b |
| Title | Data for: "Dynamics of rotated spin states and magnetic ordering with two-component bosonic atoms in optical lattices" |
| Description | This dataset contains the list of all figures used in this publication together with references to corresponding source and data files: *.m --- MATLAB source file (version R2018b) *.mat --- MATLAB data file (version R2018b) *.txt --- Text files for clarifications Work at the University of Strathclyde was supported by the EPSRC Programme Grant DesOEQ (Grant No. EP/P009565/1), and by the EOARD via AFOSR Grant No. FA9550-18-1-0064. Numerical calculations here utilized the ARCHIEWeSt High Performance Computer. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2020 |
| Provided To Others? | Yes |
| URL | https://pureportal.strath.ac.uk/en/datasets/e4684339-b68f-47d0-b293-c57e03565251 |
| Title | Data for: "Enhanced repulsively bound atom pairs in topological optical lattice ladders" |
| Description | This dataset contains data corresponding to the figures in the paper, "Enhanced repulsively bound atom pairs in topological optical lattice ladders". The data was produced through numerical simulations using Matlab. All data is saved as Matlab ".mat" files, and in the zip folder we also provide Matlab scripts for plotting the data. The plot scripts include the corresponding figure number in the name. The purpose is for future studies to be able to quantitively compare to results presented in the paper. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2020 |
| Provided To Others? | Yes |
| URL | https://pureportal.strath.ac.uk/en/datasets/81ecb9ec-7701-4940-b496-9f2785079198 |
| Title | Data for: "Interferometric measurement of micro-g acceleration with levitated atoms" |
| Description | Data and programing scripts for the figures in the article "Interferometric measurement of micro-g acceleration with levitated atoms" |
| Type Of Material | Database/Collection of data |
| Year Produced | 2019 |
| Provided To Others? | Yes |
| Title | Data for: "Microwave preparation of two-dimensional fermionic spin mixtures" |
| Description | "The folders contain for each figure showing experimental data: - the relevant datasets, - the code for producing the figure in Matlab (.m file), which is made to work in the folder structure provided - a readme .txt file describing succinctly the operations performed by the code" |
| Type Of Material | Database/Collection of data |
| Year Produced | 2019 |
| Provided To Others? | Yes |
| Impact | . |
| Title | Data for: "Nonreciprocal Quantum Transport at Junctions of Structured Leads" |
| Description | Data corresponding to the manuscript published in PRB. Requires MaLlab for accessing the files. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2019 |
| Provided To Others? | Yes |
| Title | Data for: "Reservoir engineering of Cooper-pair-assisted transport with cold atoms" |
| Description | This dataset contains all the source files used to created the figures of the article - F. Damanet, E. Mascarenhas, D. Pekker, and A. J. Daley, "Reservoir engineering of Cooper-pair-assisted transport with cold atoms", to appear in New Journal of Physics |
| Type Of Material | Database/Collection of data |
| Year Produced | 2019 |
| Provided To Others? | Yes |
| Title | Data for: "Tunable geometries from a sparse quantum spin network" |
| Description | dataset.zip contains the script and datasets which recreates the Fig. 3 and Fig. 4 of the paper "Tunable geometries from a sparse quantum spin network" written by the same authors. Folder Fig3 contains a script and sets of points which are used to create Figure 3 of the paper: plot_Fig3.py : Written for execution with Python 3.7.3 with external modules: numpy version 1.16.2 matplotlib version 3.0.3 Recreates two figures ((a) and (b)) on Figure 3. k.csv : Contains all the values of momentum between 0 and 2pi that were computed (not necessary to be plotted). W_*.csv : File with "PWR2" contains the value of Weierstrass function of PWR2 network (Fig. 3 (a)). File with "JN" contains the value of generalized sparse coupling model with interaction only occurs between the sites separated by the distances that are member of Jacobsthal Numbers (Fig. 3 (b)). Indices: index 0 is -1.2 index 1 is -1.0 index 2 is -0.8 Folder Fig4 contains a script and sets of points which are used to create Figure 4 of the paper. plot_Fig4_a.py, plot_Fig4_b.py, and plot_Fig4_a.py : written for execution with Python 3.7.3 with external modules: numpy: version 1.16.2 matplotlib: version 3.0.3 Files with "sites" contain site numbers, corresponding "tbar" files contains the values of the normalized saturation time at the corresponding sites. Meaning of the integer index on the file names: For (a) index 0 is for s=-3 index 1 is for s=3 For (b) index 0 is for s=-0.5 index 1 is for s=0.5 For (c) s = 0 |
| Type Of Material | Database/Collection of data |
| Year Produced | 2020 |
| Provided To Others? | Yes |
| URL | https://pureportal.strath.ac.uk/en/datasets/6365501d-957e-4e3a-8101-8e7360804cf2 |
| Title | Dataset for: Optical non-linearities and spontaneous translational symmetry breaking in driven-dissipative moiré exciton-polaritons |
| Description | Folder containing the data of the manuscript: Optical non-linearities and spontaneous translational symmetry breaking in driven-dissipative moiré exciton-polaritons by A. Camacho-Guardian and N. R. Cooper. Please see README document for detailed description. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/342475 |
| Title | Experimental realization of a fermionic spin-momentum lattice [Dataset and Code]. |
| Description | Data and code for figures in the paper and supplementary material. Please see ReadMe.txt file for detailed description. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/337268 |
| Title | How to realise a homogeneous dipolar Bose gas in the roton regime (data) |
| Description | Data used in the publication "How to realise a homogeneous dipolar Bose gas in the roton regime" by Juhász et al., published in Physical Review A. The readme.txt file gives a detailed explanation of the data and its structure, the data itself are contained in the data.json file. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| Impact | not aware |
| URL | https://doi.org/10.5287/bodleian:9RavjqbVB |
| Title | Hubbard Hamiltonian for the 8fold Optical Quasicrystal |
| Description | This dataset contains all the relevant Wannier functions and associated onsite energies, tunneling amplitudes and interaction energies describing a finite patch (1622 lattice sites) of the eightfold optical quasicrystal. The Wannier functions have been constructed using the method developped in [1]. If you wish to use results produced with this dataset in a scientific publication, please cite: [1] E. Gottlob and U. Schneider, Hubbard models for quasicrystalline potentials, Phys. Rev. B 107, 144202. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2023 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/348940 |
| Title | JAXFit: Trust Region Method for Nonlinear Least-Squares Curve Fitting on the GPU |
| Description | We implement a trust region method on the GPU for nonlinear least squares curve fitting problems using a new deep learning Python library called JAX. Our open source package, JAXFit, works for both unconstrained and constrained curve fitting problems and allows the fit functions to be defined in Python alone-without any specialized knowledge of either the GPU or CUDA programming. Since JAXFit runs on the GPU, it is much faster than CPU based libraries and even other GPU based libraries, despite being very easy to use. Additionally, due to JAX's deep learning foundations, the Jacobian in JAXFit's trust region algorithm is calculated with automatic differentiation, rather than than using derivative approximations or requiring the user to define the fit function's partial derivatives. |
| Type Of Material | Data analysis technique |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| Impact | n/a |
| URL | https://github.com/Dipolar-Quantum-Gases/jaxfit |
| Title | Measuring Laser Beams with a Neural Network (Data) |
| Description | The data for the the paper "Measuring Laser Beams with a Neural Network." The readme.txt file in main directory gives a detailed explanation of the data contents and structure. See https://github.com/Dipolar-Quantum-Gases/nn-beam-profiling for code pertaining to the dataset and the paper. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| Impact | not aware of any |
| URL | https://doi.org/10.5287/bodleian:JbDXrnQN1 |
| Title | Research Data supporting "Large-Scale Tight-Binding Hamiltonians of the Eightfold Quasicrystalline Potential (8QC)" |
| Description | This dataset contains the Tight-binding (TB) Hamiltonians describing the lowest band of the eightfold quasicrystalline potential. The TB Hamiltonians were constructed using localised Wannier functions generated using an extension of the methods described in [1], whereby the finite-difference methods was replaced with the sinc discrete variable representation to alleviate the memory usage of the Wannier functions and increase the maximum system size to around 12000 sites. The TB Hamiltonians describe a circular patch of diameter 70 ?. The lattice depths were generated in steps of 0.125 Er. The parameters used for this dataset were a real-space grid spacing dx = 0.1?, and a cutoff radius for generating the Wannier functions of R = 4?. Please refer to Readme file for more details of file collection and organisation. [1] E. Gottlob and U. Schneider, Hubbard models for quasicrystalline potentials, Phys. Rev. B 107, 144202. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2024 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/373617 |
| Title | Research data supporting "Bidirectional dynamic scaling in an isolated Bose gas far from equilibrium" |
| Description | Measured atom numbers, energies, and momentum distributions, as described in the linked manuscript. The readme files provided include the necessary information to interpret and use the data. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2021 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/315777 |
| Title | Research data supporting "Emergence of isotropy and dynamic scaling in 2D wave turbulence in a homogeneous Bose gas" |
| Description | The 'Figure' folders contain the source data for data points shown in the corresponding figures in the manuscript. The readme files provided include the necessary information to interpret and use the data. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/342861 |
| Title | Research data supporting "Energy-space random walk in a driven disordered Bose gas" |
| Description | The subfolders within the Code folder contain the code used to numerically solve the Schrödinger equation for a driven particle in a box (both in a 1D box and in a 3D box with disorder), as well as our stochastic simulations for our semi-classical model. The Figure folder provides data points shown in the figures of the paper, as generated by the aforementioned code. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2024 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/366337 |
| Title | Research data supporting "First and Second Sound in a Compressible 3D Bose Fluid" |
| Description | The supporting data found in the zip folder contains the experimental data points and theory curves for the paper, while the read-me file provides associated details. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/337901 |
| Title | Research data supporting "Many-body Decay of the Gapped Lowest Excitation of a Bose-Einstein Condensate" |
| Description | Data supporting the publication: The data presented in each figure is provided as well as all of the raw time traces of the center-of-mass velocity. The 'Fig' folders contain text files with the data shown in each figure, with file names providing driving amplitude and frequency identifiers. The 'CoMvData' folder contains all traces of center-of-mass velocity versus time which have been used in the paper. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2021 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/326424 |
| Title | Research data supporting "Observation of Subdiffusive Dynamic Scaling in a Driven and Disordered Bose Gas" |
| Description | The data summary includes the measured momentum distributions, and further processed data, such as atom numbers and energies, obtained using destructive absorption imaging of our samples after time of flight expansion, and averaging over experimental repetitions. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2024 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/366442 |
| Title | Research data supporting "Observation of an Inverse Turbulent-Wave Cascade in a Driven Quantum Gas" |
| Description | The 'Figure' folders contain the source data for the data points shown in the corresponding figures in the manuscript. Please also refer to the readme file which includes the necessary information to interpret and use the data. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2024 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/376319 |
| Title | Research data supporting "Observation of first and second sound in a BKT superfluid" |
| Description | The 'Figure' folders contain the source data (density distribution, time trace, response spectra, sound speeds, superfluid density) for data points shown in the corresponding figures in the manuscript. The readme files provided include the necessary information to interpret and use the data. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2021 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/322566 |
| Title | Research data supporting "Pinpointing Feshbach Resonances and Testing Efimov Universalities in ³?K" |
| Description | The data for the measurements presented throughout the figures in the paper are provided, as well as the underlying measurements that are just summarized in the Tables. The readme files provided include the necessary information to interpret and use the data. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2023 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/353418 |
| Title | Research data supporting "Universal Prethermal Dynamics of Bose Gases Quenched to Unitarity" |
| Description | The Figure folders contain the data points which reproduce each of the plots in the paper. The read-me files for each individual figure provide additional information. The Data folder contains the supporting data series (time- and momentum-resolved data used to extract the half-way times and quasi-steady-state (re)distributions). Additional information is available in the 'Overivew.txt' files. Contact details: ce330@cam.ac.uk / christoph.eigen@gmail.com zh10001@cam.ac.uk |
| Type Of Material | Database/Collection of data |
| Year Produced | 2018 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/284176 |
| Title | Research data supporting "Universal equation of state for wave turbulence in a quantum gas" |
| Description | All data presented in the figures are included in the files beginning with figure (and panel) names. The raw data used to obtain the data in the figures is provided in 'Raw data' folder. The readme file explains the contents of all files. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2023 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/349416 |
| Title | Research data supporting ''Realizing discontinuous quantum phase transitions in a strongly-correlated driven optical lattice'' |
| Description | Hierarchical Data Format version 5 (HDF5) file contains both experimental and simulation data underlying the figures in the paper. HDF5 file contains experimental data of the Mott insulator and the p-superfluid, phase diagrams, dynamics of phase transitions and corresponding theoretical simulations. Additional information is available in the 'README' file, and see the paper for more details. Contact details: uws20@cam.ac.uk. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/333992 |
| Title | Supporting Data for 'Quantum Depletion of a Homogeneous Bose-Einstein Condensate' |
| Description | The supporting data contains both the data points of all paper figures and additionally the raw Bragg Rabi-oscillation data that were used in their production. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2017 |
| Provided To Others? | Yes |
| Title | A quantum-inspired approach to exploit turbulence structures |
| Description | This capsule contains code and data associated with the publication "N. Gourianov et al, A Quantum Inspired Approach to Turbulence Structures", arXiv:2106.05782. Figs. 1,2 and 3 of that paper can be reproduced using the MATLAB programs located in the /code/ folder. The folder also contains the implementation (in C) of the tensor network algorithm described in the paper. This algorithm was used to perform simulations described in the paper, and the output of these tensor network simulations are located in the /data/ folder. |
| Type Of Technology | Software |
| Year Produced | 2022 |
| Impact | This work has generated a lot of international interest in using tensor networks to solve Partial Differential Equations, and has led to new collaborative projects across the groups associated with the Programme Grant DesOEQ, in addition to work in the group of Prof. Jaksch. |
| URL | https://codeocean.com/capsule/5183978/tree/v1 |
| Title | Code supporting "Quasiperiodicity protects quantized transport in disordered systems without gaps" |
| Description | ## Thouless Pump Simulation with Local Uniform Bounded Disorder This Python package simulates the Thouless pump of the Aubry-André model in the presence of local uniform bounded disorder. The simulation supports both single-particle and many-body initial states of non-interacting particles. ### Features - Simulation of Thouless pumping with configurable parameters - Support for local uniform bounded disorder - Parallel computation capabilities for multiple disorder strengths ### Requirements - Python 3.x - NumPy - SciPy - Matplotlib - joblib (for parallel processing) ### Usage Run the simulation using command line arguments: ``` python thouless_pump.py ``` Arguments: - `log_pumping_rate`: Logarithm of the pumping rate - `potential_strength`: Strength of the potential (V) Example: ``` python thouless_pump.py -2 1.0 ``` #### Key Functions - `generate_hamiltonian()`: Generates the Hamiltonian matrix for the Aubry-André model - `compute_pumping()`: Computes the pumping dynamics for given parameters - `plot_time_evolution()`: Visualizes the time evolution of the system - `run_simulations()`: Handles parallel execution of multiple simulations - `plot_final_profile()`: Creates visualizations of the final density profiles #### Output Results are saved in a directory structure organized by simulation parameters. ### Parameters Key configurable parameters include: - `beta`: Incommensurate parameter - `V`: Potential strength - `J`: Hopping amplitude - `phi_0`: Initial phase of the quasiperiodic modulation - `phi_end`: Final phase of the quasiperiodic modulation - `n_sites`: Number of lattice sites - `noise_amp_list`: Range of disorder strengths to simulate ### Author Emmanuel Gottlob Contact: emm.gottlob@gmail.com |
| Type Of Technology | Software |
| Year Produced | 2025 |
| Open Source License? | Yes |
| URL | https://www.repository.cam.ac.uk/handle/1810/378251 |
| Description | Cambridge Festival 2023 |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | Broadly 150 members of general public attended evening lecture and discussion on "The universe in an atom: atoms as quantum sensors for fundamental physics" as part of the Cambridge Festival. |
| Year(s) Of Engagement Activity | 2023 |
| URL | https://www.eventbrite.co.uk/e/the-universe-in-an-atom-atoms-as-quantum-sensors-for-fundamental-phys... |
| Description | DesOEQ Annual Meeting 2017 |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Industry/Business |
| Results and Impact | We held an annual meeting in the form of a three-day workshop, including a specific industry engagement session, designed to help both industry and postgraduate students understand the potential implications of developments in quantum simulation. |
| Year(s) Of Engagement Activity | 2017 |
| URL | http://desoeq.phys.strath.ac.uk/events/ |
| Description | Explorathon (European Researchers' Night) 2017 |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | Members of our research team participated in European Researcher's night, setting up stalls in the Glasgow Science Centre and shopping centres, with information on optics, quantum mechanics, and our research in quantum simulation. |
| Year(s) Of Engagement Activity | 2017 |
| Description | Outreach Activities |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Public/other audiences |
| Results and Impact | General outreach - informing general public about chances and limitations of quantum technologies, in particular quantum information and quantum computing |
| Year(s) Of Engagement Activity | 2018,2019,2020,2021,2022 |
| Description | Participation in NASA Workshop on Quantum Computing for Aeroscience and Engineering |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Professional Practitioners |
| Results and Impact | Prof. Andrew Daley participated in the NASA Workshop on Quantum Computing for Aeroscience and Engineering, and took part in a panel discussion on the future of quantum computing, and the role of engineering applications in motivating and developing this. |
| Year(s) Of Engagement Activity | 2017 |
| Description | Physics at Work |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Schools |
| Results and Impact | Physics at Work aims to show 14-16yr olds the variety of careers to which study in Physics can lead and the range of practical problems that physics can be used to solve. This event is open to all schools and is free (there is a £10 per group refundable deposit). The exhibition is run in a similar way each year, based upon interaction between active scientific researchers and students. This will help to inform and spread the excitement of modern physics research to students who will soon be making career and examination choices, and is a vital component in encouraging the next generation of scientists. The Physics at Work Exhibition runs over three days, with two sessions on each day. This event is centred around approximately 25 exhibitors and is held at the Cavendish Laboratory in Cambridge. Some of the exhibitors are from research groups within the Cavendish Laboratory and the others are from industry, including companies such as Rolls-Royce Plc., Domino Printing Services and the AWE. Each half-day session typically has a capacity for about 450 students. The students are split into small groups of around 15 and are accompanied by a teacher as they follow a route defined by the organisers. Each small group, with its teacher, visits six exhibits over a period of about three hours, including a short break halfway through. Each exhibit usually consists of a short presentation, practical demonstrations, an opportunity for hands-on involvement and time for asking questions. A booklet of information is provided to support the exhibition, allowing teachers to bring ideas back into their lessons later in the year. This structured approach has developed over time and allows the students to engage thoroughly with the science on display. |
| Year(s) Of Engagement Activity | 2022,2023 |
| URL | https://outreach.phy.cam.ac.uk/programme/physicsatwork |
| Description | Physics: Lab to Life |
| Form Of Engagement Activity | Participation in an open day or visit at my research institution |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | A public open event, which includes lab tours, flash talks, and hands-on demonstrations. The aim of the event is to communicate how Oxford physics research will have an impact on society. |
| Year(s) Of Engagement Activity | 2024 |
| URL | https://www.physics.ox.ac.uk/events/physics-lab-life-2024 |
| Description | Physics: Lab to Life |
| Form Of Engagement Activity | Participation in an open day or visit at my research institution |
| Part Of Official Scheme? | No |
| Geographic Reach | Local |
| Primary Audience | Public/other audiences |
| Results and Impact | In this event, open to the general public, consists of a range of talks activities and lab tours. My contribution was opening up my lab for lab tours where over the course of the evening 3 groups of ~10 members of the general public are introduced to my research, given tour of my lab and invited to ask questions. |
| Year(s) Of Engagement Activity | 2019,2022,2023 |
| URL | https://www.physics.ox.ac.uk/engage/schools/secondary-schools/oxford-schools/physics-lab-life-what-c... |
| Description | Quantum 101 |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Schools |
| Results and Impact | Whole day event for 13-15 year old school children. This involved devising new experiments for children and running lab tours. |
| Year(s) Of Engagement Activity | 2019 |
| Description | UK Quantum showcase |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Industry/Business |
| Results and Impact | UK national Quantum showcase |
| Year(s) Of Engagement Activity | 2021,2022,2023 |
| URL | https://iuk.ktn-uk.org/events/uk-national-quantum-technologies-showcase-2023/ |
| Description | UK/Austria Quantum Exchange |
| Form Of Engagement Activity | A formal working group, expert panel or dialogue |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Third sector organisations |
| Results and Impact | UK/Austria Quantum Exchange, organized by British Embassy Vienna, UK Science and Innovation Network (UK SIN). quantum exchange early March (4/5 March) with the quantum research, start-up and tech community in Austria - specifically with the quantum community in Innsbruck (with innovative research in quantum computing, quantum optics and information and a strong and growing quantum start-up and university spin-off scene) The idea is to bring the quantum research communities and leading labs both in the area of quantum computing / quantum optics in the UK and in Innsbruck together to build new and strengthen existing academic networks and connections as basis for future broader collaboration between the UK and Austria (Innsbruck). |
| Year(s) Of Engagement Activity | 2024 |
| Description | Youth Quantum Summit 2023 |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Schools |
| Results and Impact | The Youth Quantum Summit at the University of Oxford was one of the largest in-person quantum events for Sixth Form students in the UK. Having a range of speakers, from Professor David Deutsch (one of the pioneers of quantum computation) to IBM Qiskit Advocate Maria, we hosted a day where students got a direct glimpse into world-leading quantum research and the quantum industry. |
| Year(s) Of Engagement Activity | 2023 |
| URL | https://www.qsium.org.uk/events/youth-quantum-summit-yqs-at-the-university-of-oxford |