| Project/Area Number |
21J10521
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 国内 |
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| Review Section |
Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
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| Research Institution | Okinawa Institute of Science and Technology Graduate University |
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Principal Investigator |
Keller Tim 沖縄科学技術大学院大学, 科学技術研究科, 特別研究員(DC2)
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| Project Period (FY) |
2021-04-28 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2022: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2021: ¥500,000 (Direct Cost: ¥500,000)
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| Keywords | Ultracold gases / Strongly correlated / One-dimensional mixture / Quantum phase transition / Bose-Einstein condensate / Critical metrology |
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| Outline of Research at the Start |
My research is about the study of quantum systems comprised of interacting cold atoms from the perspective of thermodynamics. In particular, I aim to perform extensive numerical simulations of complex composite quantum systems to show how their interactions can be used for their precise control either directly via the system parameters or indirectly by coupling them to an open environment.
Gaining such control allows to employ these systems as working media in quantum heat engines in order to study peculiar effects like quantum supremacy in the newly emerging field of quantum thermodynamics.
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| Outline of Annual Research Achievements |
The work on the self-pinning transition for a two component quasi-one-dimensional quantum gas was extended to the case of finite intra-species repulsion for the component immersed into the Bose-Einstein condensate (BEC), going beyond the previously studied Tonks-Girardeau limit of infinite intra-species interaction. If the finite repulsion is weak compared to the inter-species interaction with the BEC, the immersed component can persist in a coherent superfluid state. Extensive simulations of the numerically amenable case of two and three immersed atoms were used to calculate the phase diagram of the system. The superfluid and self-pinned phases are connected via a first-order phase transition that is also captured by the effective analytical model developed previously. The model predicts the transition to coincide with the two-component miscibility criterion in the limit of large particle numbers in the immersed component.
The results are described in a preprint on arXiv in collaboration with Dr. Thomas Fogarty and Prof. Thomas Busch that has been accepted for publication in SciPost Physics.
During FY 2022 I also presented posters at the domestic conference "Ultracold Atoms Japan" in Okinawa in April 2022 as well as at the international conference "FINESS" in St. Martin, Germany, in May 2022.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
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