A quantum engine in the BEC-BCS crossover.
A quantum engine in the BEC-BCS crossover.
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DOI:
10.1038/s41586-023-06469-8
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发表时间:
2023-09
期刊:
影响因子:
64.8
通讯作者:
Widera, Artur
中科院分区:
文献类型:
--
作者:
Koch, Jennifer;Menon, Keerthy;Cuestas, Eloisa;Barbosa, Sian;Lutz, Eric;Fogarty, Thomas;Busch, Thomas;Widera, Artur
Heat engines convert thermal energy into mechanical work both in the classical and quantum regimes. However, quantum theory offers genuine non-classical forms of energy, different from heat, which so far have not been exploited in cyclic engines. Here we experimentally realize a quantum many-body engine fuelled by the energy difference between fermionic and bosonic ensembles of ultracold particles that follows from the Pauli exclusion principle. We employ a harmonically trapped superfluid gas of 6Li atoms close to a magnetic Feshbach resonance that allows us to effectively change the quantum statistics from Bose–Einstein to Fermi–Dirac, by tuning the gas between a Bose–Einstein condensate of bosonic molecules and a unitary Fermi gas (and back) through a magnetic field. The quantum nature of such a Pauli engine is revealed by contrasting it with an engine in the classical thermal regime and with a purely interaction-driven device. We obtain a work output of several 106 vibrational quanta per cycle with an efficiency of up to 25%. Our findings establish quantum statistics as a useful thermodynamic resource for work production. This study reports the creation of a model thermodynamic engine that is fuelled by the energy difference resulting from changing the statistics of a quantum gas from bosonic to fermionic.
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影响因子:
16.6
作者:
Bouton Q;Nettersheim J;Burgardt S;Adam D;Lutz E;Widera A
通讯作者:
Widera A
影响因子:
8.6
作者:
Bartenstein, M;Altmeyer, A;Grimm, R
通讯作者:
Grimm, R
影响因子:
8.6
作者:
Chen, QJ;Stajic, J;Levin, K
通讯作者:
Levin, K
影响因子:
8.6
作者:
de Assis, Rogerio J.;de Mendonca, Taysa M.;de Almeida, Norton G.
通讯作者:
de Almeida, Norton G.
影响因子:
56.9
作者:
Jochim, S;Bartenstein, M;Grimm, R
通讯作者:
Grimm, R