| Project/Area Number |
21K13856
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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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 | 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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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | quantum control / quantum speed limits / few-body systems / many-body systems / quantum heat engine / thermodynamics / cold atoms / few-body / many-body / interacting gases / supersymmetry / orthogonality / interacting states / quantum correlations / quantum entanglement |
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| Outline of Research at the Start |
The goal of my project will be to explore the effect of finite interactions on the dynamics of a few-particle cold atom system and if their inherent correlations can increase the speed of evolution. To achieve this I plan to examine the QSL in various correlation regimes using both controlled and quench dynamics. While many works on QSLs and control consider mean-field and discrete systems due to their accessibility, this project aims to go beyond these models to develop QSLs for continuous variable quantum systems while taking realistic inter-particle interactions into account.
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| Outline of Final 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 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, and is the first work on this topic. In summary the project showed how concepts from quantum control and speed limits can be extended to complex interacting quantum systems, an important for building the next era of quantum devices such as quantum heat engines and batteries, which are enhanced due to quantum effects.
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| Academic Significance and Societal Importance of the Research Achievements |
My work extending control concepts to many-particle quantum systems has many applications in future quantum devices. For instance, due to the presence of correlations these systems can show an improvement over classical ones. These techniques are readily applicable to current cold atom experiments.
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