Quantum light spectroscopy of complex quantum systems
Lead Research Organisation:
University of Warwick
Department Name: Physics
Abstract
Spectroscopy reveals properties of complex systems such as its structure and dynamics - physical, molecular, electronic which are typically inaccessible directly due to their atomic or molecular size and ultrafast (femtosecond) timescales. It works by shining light on a sample and measuring the light after the light-matter interaction. Most spectroscopy techniques use light pulses produced by a laser in a classical state called the 'coherent' state. Recently, non-classical or quantum states of light have provided greater precision is estimating unknown parameters in areas such as imaging and interferometry. The premier example of the latter are laser-interferometric gravitational wave detectors. In addition to coherent states from lasers, these detectors use 'squeezed' states to improve their performance.
Nonlinear ultrafast spectroscopy, the state-of-the-art tool used to study dynamics in complex quantum systems has provided rich insights. However, any insight is routinely realised via comparison to theoretical results, which must incorporate both the elaborate theoretical models needed to calculate the spectra in addition to particulars of the materials and processes being studied. Furthermore, the information of interest is often obscured by spectral broadening such that interpretation of the spectra is sometimes described as "blobology".
While proposals have been made towards overcoming some of these limitations by performing spectroscopy with quantum light, the known methods remain distant experimentally. One challenge is the low light intensity typical in nonlinear spectroscopy with quantum light. Another challenge is that quantum light spectroscopy proposals often rely on the principle of improving existing classical light techniques by replacing one or more classical pulses by quantum light to reveal certain features of interest, rendering them increasingly baroque in practice.
My idea is to start from the opposite end. I will seek the most precise and optimal spectroscopic method - in terms of the quantum state of the input light, the interaction between the light and sample, and the detection of the light - allowed by the laws of quantum mechanics for investigating complex quantum systems. To that end I will introduce new concepts from quantum and classical estimation theory, and statistics into nonlinear spectroscopy, quantum optics, and open quantum systems.
Nonlinear ultrafast spectroscopy, the state-of-the-art tool used to study dynamics in complex quantum systems has provided rich insights. However, any insight is routinely realised via comparison to theoretical results, which must incorporate both the elaborate theoretical models needed to calculate the spectra in addition to particulars of the materials and processes being studied. Furthermore, the information of interest is often obscured by spectral broadening such that interpretation of the spectra is sometimes described as "blobology".
While proposals have been made towards overcoming some of these limitations by performing spectroscopy with quantum light, the known methods remain distant experimentally. One challenge is the low light intensity typical in nonlinear spectroscopy with quantum light. Another challenge is that quantum light spectroscopy proposals often rely on the principle of improving existing classical light techniques by replacing one or more classical pulses by quantum light to reveal certain features of interest, rendering them increasingly baroque in practice.
My idea is to start from the opposite end. I will seek the most precise and optimal spectroscopic method - in terms of the quantum state of the input light, the interaction between the light and sample, and the detection of the light - allowed by the laws of quantum mechanics for investigating complex quantum systems. To that end I will introduce new concepts from quantum and classical estimation theory, and statistics into nonlinear spectroscopy, quantum optics, and open quantum systems.
Organisations
Publications
Albarelli F
(2023)
Fundamental limits of pulsed quantum light spectroscopy: Dipole moment estimation
in Physical Review A
Gianani I
(2021)
Kramers-Kronig relations and precision limits in quantum phase estimation
in Optica
Cimini V
(2021)
Semiparametric estimation of the Hong-Ou-Mandel profile
in Physical Review A
Description | We have discovered the fundamental limits of atomic spectroscopy with quantum light. |
Exploitation Route | Our theoretical work can be used by experimentalists to develop novel methods of spectroscopy. |
Sectors | Agriculture Food and Drink Chemicals Healthcare Manufacturing including Industrial Biotechology Pharmaceuticals and Medical Biotechnology |
URL | https://arxiv.org/abs/2307.02204 |
Description | MID-INFRARED QUANTUM TECHNOLOGY FOR SENSING |
Amount | € 2,662,604 (EUR) |
Funding ID | 101070700 |
Organisation | European Commission |
Sector | Public |
Country | European Union (EU) |
Start | 09/2022 |
End | 09/2025 |
Description | Aiman Khan contributed talk, APS March meeting 2023 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Postgraduate students |
Results and Impact | The American Physical Society March Meeting, March 5-10, 2023, Las Vegas, NV, USA. |
Year(s) Of Engagement Activity | 2023 |
URL | https://www.aps.org/meetings/meeting.cfm?name=MAR23 |
Description | Aiman Khan invited talk, Dresden 2023 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Postgraduate students |
Results and Impact | International Workshop on Atomic Physics 27 November - 1 December 2023 with focus days on "Research Highlights in the Eyes of Editors" |
Year(s) Of Engagement Activity | 2023 |
URL | https://www.pks.mpg.de/atom23 |
Description | Animesh Datta invited to IISER Kolkata (online) 2023 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Postgraduate students |
Results and Impact | Online talk at international conference. |
Year(s) Of Engagement Activity | 2023 |
URL | https://www.youtube.com/watch?v=mAdbt6rYK0c |
Description | Animesh Datta invited to KITP, Santa Barbara 2023 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Postgraduate students |
Results and Impact | Presentation at KITP, Santa Barbara, USA. Overview of research field led to subsequent discussions. |
Year(s) Of Engagement Activity | 2023 |
URL | https://online.kitp.ucsb.edu/online/qmetro23/datta/ |
Description | Animesh Datta invited to NSF/UKRI workshop 2024 |
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 | NSF/UKRI Bilateral Workshop on Quantum Information Science in Chemistry, Alexandria, VA, USA. |
Year(s) Of Engagement Activity | 2024 |
Description | Animesh Datta invited to Turin, 2023 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Postgraduate students |
Results and Impact | Invited talk at conference. |
Year(s) Of Engagement Activity | 2023 |
URL | http://www.quantum2023.unito.it |
Description | Animesh Datta invited to UCL Quantum CDT 2023 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Postgraduate students |
Results and Impact | Lecture to CDT students at UCL. |
Year(s) Of Engagement Activity | 2023 |
Description | Elnaz Darsheshdar Contributed talk, Bristol 2023 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Postgraduate students |
Results and Impact | Bristol Quantum Information Technologies Conference. |
Year(s) Of Engagement Activity | 2023 |
URL | https://www.bristol.ac.uk/media-library/sites/qet-labs/documents/bqit/BQIT23%20full%20programme.pdf |
Description | Invited talk at BQIT 2022 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Postgraduate students |
Results and Impact | Invited online talk. |
Year(s) Of Engagement Activity | 2022 |
URL | https://www.bristol.ac.uk/media-library/sites/qet-labs/documents/BQIT22%20full%20programme.pdf |
Description | Invited talk at QuEBS 2022 |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Postgraduate students |
Results and Impact | Invited talk at QuEBS 2022 |
Year(s) Of Engagement Activity | 2022 |
URL | https://www.quebs.gr |
Description | Summer school |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Postgraduate students |
Results and Impact | Invited lecture at UCL Advanced Summer School on Quantum Technologies, 2022 |
Year(s) Of Engagement Activity | 2022 |