| 研究課題/領域番号 |
23K13035
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| 研究種目 |
若手研究
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| 配分区分 | 基金 |
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| 審査区分 |
小区分13010:数理物理および物性基礎関連
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| 研究機関 | 沖縄科学技術大学院大学 |
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研究代表者 |
CUESTAS Eloisa 沖縄科学技術大学院大学, 量子システム研究ユニット, 客員研究員 (40973590)
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| 研究期間 (年度) |
2023-04-01 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
4,420千円 (直接経費: 3,400千円、間接経費: 1,020千円)
2024年度: 2,210千円 (直接経費: 1,700千円、間接経費: 510千円)
2023年度: 2,210千円 (直接経費: 1,700千円、間接経費: 510千円)
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| キーワード | quantum engines / ultracold Fermi gases / quantum thermodynamics / quantum technology / Pauli engine / Quantum Statistics / Quantum Engines / BEC-BCS Crossover / Ultracold Fermi Gases |
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| 研究開始時の研究の概要 |
In this project I aim to present and establish statistics as a useful resource for work production in a totally new class of quantum engines: the Pauli engines. The quantum engines realized so far convert thermal energy into mechanical work by cyclically operating between thermal reservoirs at different temperatures, like classical engines. In contrast, the mechanism of the Pauli engine is of purely quantum origin and has no counterpart in the classical regime: it is fueled by the energy associated with the change of statistics of the working medium, from bosonic to fermionic and back.
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| 研究実績の概要 |
Thanks to this project I was able to present a new class of many-body quantum engine termed as Pauli engine. The engine is fueled by the energy associated with the change in the statistical behavior of the working medium from bosonic to fermionic and back. The machine exploits genuine nonclassical forms of energy different from heat and was experimentally realized using a trapped ultracold quantum gas with an efficiency of 25%. These results establish quantum statistics as a useful thermodynamic resource for work production and have encountered great excitement in the quantum thermodynamic community, leading to a publication in Nature and several talks in conferences. Moreover, the possible quantum technological applications have sparked interest not only in academy but also in industry.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
I originally targeted to have already the optimization of the engine and the study of the dimensional crossover together with different geometries of the trap on the first year. Since the project was quite ambitious and the presentation of results in conferences and talks during group visits required a considerable amount of time, this is still on progress. I am currently writing a work with the detailed theoretical treatment that led to the results presented in [Nature 621, 723 (2023)] plus a study of the engine under other regimes. I also supervised Nicola Mang’s internship focused on the understanding and general characterization of the Pauli engine in one-dimension and the comparison to the three-dimensional case (presented as Mang’s bachelor thesis in Germany with excellent grades).
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| 今後の研究の推進方策 |
The goals for the medium time future are: i) to close the writing of the detailed theoretical model underlying the results presented in [Nature 621, 723] including the study of the engine in other regimes in three-dimensions (my preliminary results suggest that the efficiency can reach the ideal bound when the system is driven from what is call unitarity to the BCS regime because the extra energy cost due to the binding energy is avoided), ii) continue and close the one-dimensional study, iii) explore possible dimensional crossovers. All of these scenarios are realistic from an experimental point of view. If time allows, iv) tackle the optimization of the efficiency regarding the geometry of the trap, and v) address the Pauli engine in systems other than ultracold quantum gases in a trap.
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