The source of quantum advantages: a unified approach to quantum resources of states and processes
| Project/Area Number |
22KF0067
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| Project/Area Number (Other) |
21F21015 (2021-2022)
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Multi-year Fund (2023)
Single-year Grants (2021-2022) |
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| Section | 外国 |
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| Review Section |
Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
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| Research Institution | Institute of Physical and Chemical Research (2023)
The University of Tokyo (2021-2022) |
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Principal Investigator |
村尾 美緒 (2021-2022) 東京大学, 大学院理学系研究科(理学部), 教授 (30322671)
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| Co-Investigator(Kenkyū-buntansha) |
REGULA BARTOSZ 国立研究開発法人理化学研究所, 量子コンピュータ研究センター, 理研白眉研究チームリーダー (70980514)
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| Project Period (FY) |
2023-03-08 – 2024-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2023: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 2022: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2021: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Quantum resources / Quantum entanglement / Quantum thermodynamics / Hypothesis testing / Quantum channels / Higher-order operations |
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| Outline of Research at the Start |
The project aims to develop a framework to describe physical phenomena which enable quantum advantages, focusing in particular on the resources of quantum processes. This will establish limitations on the processing of quantum information and the manipulation of quantum channels.
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| Outline of Annual Research Achievements |
During the second phase, we focused on three tasks: (1) extending developments started in the first year, in particular the study of probabilistic transformations of quantum resources; (2) exploring new questions in the discrimination of quantum states and channels; (3) studying the asymptotic properties of quantum entanglement.
With regards to point (1), this led to a new publication and an invited talk presentation at the Workshop on Quantum Information, Computation, and Foundations 2022 organized by Kyoto University.
Point (2) led to several papers which are now undergoing review.
Point (3) has led to two major publications, one which revealed significant differences between the theories of quantum entanglement and thermodynamics, and one which extended these ideas to quantum channels.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
Our results on the characterisation of quantum entanglement have been published in the high-impact journal Nature Physics, presented at several international conferences, and featured in scientific press, showing the significance of our findings in this direction.
We have also been able to develop a novel approach to quantum hypothesis testing assisted by postselection, which goes beyond previously studied techniques and has potential to lead to new insights in the characterization of quantum state discrimination.
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| Strategy for Future Research Activity |
The final part of the project will aim to extend more of our methods and results developed for quantum states, so that they can also be applied to quantum processes (quantum channels and more general higher-order quantum transformations). This will in particular concern the question of discrimination and hypothesis testing of quantum channels, where there are promising avenues to generalise previous techniques to shed new light onto the fundamental questions of how well two (or more) quantum processes can be distinguished.
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Report
(2 results)
Research Products
(8 results)
