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Hub for Quantum Computing via Integrated and Interconnected Implementations (QCI3)

Lead Research Organisation: UNIVERSITY OF OXFORD
Department Name: Oxford Physics (Keble Road)

Abstract

Over the next few decades, quantum computing (QC) will transform the way we design new materials, plan complex logistics and solve a wide range of problems that conventional computers cannot address. The Hub for Quantum Computing via Integrated and Interconnected Implementations (QCI3) brings together >50 investigators across 20 universities to address key challenges, and deliver applications across diverse areas of engineering and science. We will work with 27 industrial partners, the National Quantum Computing Centre, the National Physical Laboratory, academia, regulators, Government and the wider community to achieve our goals.

The Hub will focus on where collaborative academic research can make transformative progress across three interconnected themes: (T1) developing integrated quantum computers, (T2) connecting quantum computers, and (T3) developing applications for them. Objectives for each are outlined below.

(T1) Developing integrated quantum computing systems, with a goal of creating quantum processors that will show real utility for specific problem examples.

Objectives:

OB1.1: Demonstrate quantum advantage in analogue platforms with neutral atoms and photons
OB1.2: Make neutral atom quantum simulation platforms available in the cloud
OB1.3: Develop new applications for these and other near-term systems
(T2) A key challenge of building the million qubit machines of the future is that of 'wiring' together the quantum processors that will create such a machine. The Hub will develop technologies that help achieve this and develop models to understand how such machines will scale.

Objectives :

OB2.1: Develop interconnect technologies for quantum processors
OB2.2: Demonstrate blind computing and multi-component networks with trapped ion quantum computers
OB2.3: Demonstrate transduction and networking of superconducting processors
(T3) Developing applications in science and engineering, including materials design, chemistry and fluid dynamics.

Objectives:

OB3.1: Develop new methods for materials and chemical system modelling and design, fluid dynamics, and quantum machine learning
OB3.2: Identify the nearest routes to quantum advantage for these application areas
OB3.3: Develop implementations of these algorithms on T1 and T2 Hardware
These will be supported by work in overarching tools (T4) that can be used across the themes of the Hub, including error correction, digital twins, verification and software stack optimisation.

Skills and training

Hub partners will work with end-users, our students and researchers, and partners across the UK National Quantum Technologies Programme (UKNQTP) to ensure members of the Hub have the skills they need. Specific objectives include:

Provide training in innovation, commercialisation and IP, Equality, Diversity and Inclusion and Responsible Research and Innovation (RRI) to Hub partners
Provide reports and training to end-users, working in partnership with the NQCC and others
Continue to provide advocacy and advice to policy makers, through work in such areas as RRI
Exploitation and Engagement:

The Hub will build on the strong engagement activities of the UK programme, further developing the technology pipeline. We will play a key role in strengthening and expanding the UK ecosystem through events, networking and education.

Specific goals are to:

Broaden the partnership of the Hub, bringing new academic, government and industrial partners into the Hub network
Contribute to regulation and governance through programmes of work in standards and RRI, and close collaboration with UKNQTP partners
Support the generation and protection of intellectual property within the Hub, and its exploitation
Develop Hub and cross-Hub outreach initiatives, working with the RRI team, to help ensure the potential of quantum computing for societal benefit can be realised

People

ORCID iD
Dominic O'Brien (Principal Investigator)
Oliver Brown (Co-Investigator) orcid http://orcid.org/0000-0002-5193-8635
Kin Leung (Co-Investigator)
Jonathan Pritchard (Co-Investigator)
Chander Velu (Co-Investigator)
Peter Mosley (Co-Investigator)
Animesh Datta (Co-Investigator) orcid http://orcid.org/0000-0003-4021-4655
Myungshik Kim (Co-Investigator)
Ulrich Schneider (Co-Investigator) orcid http://orcid.org/0000-0003-4345-9498
Sarah Harris (Co-Investigator) orcid http://orcid.org/0000-0002-2812-1651
Mustafa Bakr (Co-Investigator)
Christopher Ballance (Co-Investigator)
Paul Warburton (Co-Investigator)
Natalia Ares (Co-Investigator)
Raghavendra Srinivas (Co-Investigator) orcid http://orcid.org/0000-0002-8462-6072
Joseph Goodwin (Co-Investigator) orcid http://orcid.org/0000-0001-5656-2086
Mark Parsons (Co-Investigator) orcid http://orcid.org/0000-0003-4097-7468
Winfried Hensinger (Co-Investigator)
Axel Kuhn (Co-Investigator)
Simon Cornish (Co-Investigator)
Peter Horak (Co-Investigator) orcid http://orcid.org/0000-0002-8710-8764
Ivan Rungger (Co-Investigator)
Chris Heunen (Co-Investigator) orcid http://orcid.org/0000-0001-7393-2640
Peter Coveney (Co-Investigator)
Matthias Keller (Co-Investigator)
Jonathan De Beaudrap (Co-Investigator) orcid http://orcid.org/0000-0001-9549-5146
Vivien Kendon (Co-Investigator) orcid http://orcid.org/0000-0002-6551-3056
Kristina Rusimova (Co-Investigator)
Silvia Bergamini (Co-Investigator)
Ian Walmsley (Co-Investigator)
James Gates (Co-Investigator) orcid http://orcid.org/0000-0001-8671-5987
Anthony Bennett (Co-Investigator)
Tobias Lindstrom (Co-Investigator) orcid http://orcid.org/0000-0003-1861-6551
Petros Wallden (Co-Investigator) orcid http://orcid.org/0000-0002-0255-6542
Andrew Daley (Co-Investigator)
David Tew (Co-Investigator)
Hannah Williams (Co-Investigator) orcid http://orcid.org/0000-0001-8356-8539
Andrew Green (Co-Investigator)
Steven Lind (Co-Investigator)
Raul Garcia-Patron Sanchez (Co-Investigator) orcid http://orcid.org/0000-0003-1760-433X
Raj Patel (Co-Investigator)
Yingkai Ouyang (Co-Investigator) orcid http://orcid.org/0000-0003-1115-0074
Marina Denise Anne Jirotka (Co-Investigator)
Jason Smith (Co-Investigator)
John Saunders (Co-Investigator)
Florian Mintert (Co-Investigator)
Joshua Nunn (Co-Investigator)
Helena Knowles (Co-Investigator) orcid http://orcid.org/0000-0002-5110-9634
David Lucas (Co-Investigator)
William Steven Kolthammer (Co-Investigator)
Nicholas Chancellor (Co-Investigator) orcid http://orcid.org/0000-0002-1293-0761
Martin Weides (Co-Investigator) orcid http://orcid.org/0000-0002-2718-6795
Stefan Kuhr (Co-Investigator)
Oleksandr Kyriienko (Co-Investigator)
Alexander Davis (Co-Investigator) orcid http://orcid.org/0000-0002-2097-4246
Peter Haynes (Co-Investigator) orcid http://orcid.org/0000-0002-1532-6164
Elham Kashefi (Co-Investigator)
RHONDA AU YEUNG (Researcher Co-Investigator)
 
Title Breakdown of bosonic Thouless pump due to interaction in a quasiperiodic lattice 
Description We investigate the effect of inter-particle interaction on the quantized Thouless pump in the bosonic quasiperiodic Aubry-André model and find that the quantization of the pumped charge breaks down already for weak interactions.  Furthermore, the pumped charge undergoes sharp changes as a function of interaction strength that we can attribute to the closing of specific doublon channels. As expected, the quantization revives in the hard-core limit at very large interaction strengths where the bosons are subject to a hardcore constraint.  Interestingly, the stability of isolated doublons under the pump depends on the band they are in. For repulsive interactions and a suitably fixed pump period, doublons in the lowest band are pumped stably while doublons in higher bands dissociate during the pump with one particle decaying into a lower band. This asymmetry leads to the decay of the total energy over time, in stark contrast to the typical Floquet heating expected for a driven many-body system. 
Type Of Material Database/Collection of data 
Year Produced 2026 
Provided To Others? Yes  
URL https://zenodo.org/doi/10.5281/zenodo.18335986
 
Title Breakdown of bosonic Thouless pump due to interaction in a quasiperiodic lattice 
Description We investigate the effect of inter-particle interaction on the quantized Thouless pump in the bosonic quasiperiodic Aubry-André model and find that the quantization of the pumped charge breaks down already for weak interactions.  Furthermore, the pumped charge undergoes sharp changes as a function of interaction strength that we can attribute to the closing of specific doublon channels. As expected, the quantization revives in the hard-core limit at very large interaction strengths where the bosons are subject to a hardcore constraint.  Interestingly, the stability of isolated doublons under the pump depends on the band they are in. For repulsive interactions and a suitably fixed pump period, doublons in the lowest band are pumped stably while doublons in higher bands dissociate during the pump with one particle decaying into a lower band. This asymmetry leads to the decay of the total energy over time, in stark contrast to the typical Floquet heating expected for a driven many-body system. 
Type Of Material Database/Collection of data 
Year Produced 2026 
Provided To Others? Yes  
URL https://zenodo.org/doi/10.5281/zenodo.18335985
 
Title Dataset for "The origin and influence of non-cavity modes in a micropillar Bragg microcavity" 
Description Fig. 1b : Simulated normalised far-field intensity,angular emission profile above a 2.00 µm diameter micropillar with 7 (26) upper (lower) DBR pairs. ASCII file in table format. Fig. 1c,d : Simulated emission power spectrum in the upward direction and summed over all directions. ASCII file with 3 columns for [Wavelength, Upward emission, All emission]. Fig. 1ef: Purcell factor, cavity mode emission, and non-cavity mode emission and spontaneous emission (SE) coupling factor as a function of pillar diameter. ASCII file of columns with [Diameter, Purcell Factor, G_c, G_l, Beta]. Fig. 2a/b/c/d : Purcell factor for a source in the centre of the spacer layer, in a Bragg cavity (a,b) or uniform (c,d) pillar as a function of pillar diameter. In (a,c) only the emission through the top and bottom monitors T_(+z) and T_(-z) are considered while in (b,d) emission through all sides is considered. ASCII files in table format with wavelength along first column and diameter in first row. Fig. 3a/b/c/d : Purcell factor for a source in a Bragg cavity (a,b) or uniform (c,d) pillar for a constant pillar diameter of 1.85 µm , as function of the source height. In (a,c) only the emission through the top and bottom monitors T_(+z) and T_(-z) are considered while in (b,d) emission through all sides is considered. ASCII files in table format with wavelength along first column and source height in first row. Fig. 4a/b/c/d : Purcell factor for a source in the centre of the spacer layer, in a Bragg cavity (a,b) or uniform (c,d) pillar for a constant pillar diameter of 1.85 µm , as function of an additional GaAs layer added to the top of the pillar. In (a,c) only the emission through the top and bottom monitors T_(+z) and T_(-z) are considered while in (b,d) emission through all sides is considered. ASCII files in table format with wavelength along first column and GaAs thickness in first row. Fig. 5a/b/c/d/e/f : Absolute electric field |E| cross-sectional profiles for 1.85 µm micropillars (grey outline) at the HE11 mode wavelength for a cavity pillar excited by a dipole at the cavity mode anti-node (z = 0 µm) in the centre of the spacer layer, in (a) on the y = 0 plane (x-z), parallel to the dipole and in (b) on the x = 0 plane (y-z), perpendicular to it. (c, d) as (a, b), but for a dipole at the lower cavity mode node (z = -0.067 µm). (e,f) as (a, b), but for a uniform micropillar. ASCII files in table format with x-coordinate along first column and y-coordinate in first row. 
Type Of Material Database/Collection of data 
Year Produced 2025 
Provided To Others? Yes  
URL https://research-data.cardiff.ac.uk/articles/dataset/Dataset_for_The_origin_and_influence_of_non-cav...