2023 Fiscal Year Annual Research Report
Exploring the effect of correlations on quantum speed limits in interacting cold atom systems
| Project/Area Number |
21K13856
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| Research Institution | Okinawa Institute of Science and Technology Graduate University |
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Principal Investigator |
FOGARTY Thomas 沖縄科学技術大学院大学, 量子システム研究ユニット, スタッフサイエンティスト (60786987)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | quantum speed limits / quantum control / few-body / many-body / interacting gases / supersymmetry / thermodynamics |
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| Outline of Annual Research Achievements |
The aim of the research grant was to explore nonequilibrium dynamics in complex quantum systems, with a focus on quantum speed limits and quantum control. In the final year of the research grant two papers were published. The first was in Physical Review Research on "Entropy of the Work Distribution" which focussed on the statistics of the work distribution following quenches in quantum critical models. We found that the Shannon entropy of the work distribution admits a general bound depending on the initial diagonal entropy, which is a purely quantum term, and that this describes the nonequilibrium properties of the system. The other paper published in this year was a review in Physics Reports entitled "Few-body Bose gases in low dimensions;A laboratory for quantum dynamics". This review focussed on nonequilibrium dynamics in 1D, specifically in interacting few- and many-body systems. This review encompassed the main topics of this Kakenhi and will be valuable resource for future works.
In Total 8 papers were published on these topics, 2 in the prestigious Physical Review letters, 3 in Physical Review Research, 1 in the journal Quantum, and 1 review article in Physics Reports. Finally an article was published for a special issue in New Journal of Physics on "Focus on Quantum Speed Limits and its Applications". This article is the highlight of this project, showing how quantum speed limits emerge in supersymmetric quantum mechanics and how these relate to high fidelity quantum control of these systems.
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