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A quantum heat engine driven by atomic collisions

Author

Listed:
  • Quentin Bouton

    (Technische Universität Kaiserslautern)

  • Jens Nettersheim

    (Technische Universität Kaiserslautern)

  • Sabrina Burgardt

    (Technische Universität Kaiserslautern)

  • Daniel Adam

    (Technische Universität Kaiserslautern)

  • Eric Lutz

    (University of Stuttgart)

  • Artur Widera

    (Technische Universität Kaiserslautern)

Abstract

Quantum heat engines are subjected to quantum fluctuations related to their discrete energy spectra. Such fluctuations question the reliable operation of thermal machines in the quantum regime. Here, we realize an endoreversible quantum Otto cycle in the large quasi-spin states of Cesium impurities immersed in an ultracold Rubidium bath. Endoreversible machines are internally reversible and irreversible losses only occur via thermal contact. We employ quantum control to regulate the direction of heat transfer that occurs via inelastic spin-exchange collisions. We further use full-counting statistics of individual atoms to monitor quantized heat exchange between engine and bath at the level of single quanta, and additionally evaluate average and variance of the power output. We optimize the performance as well as the stability of the quantum heat engine, achieving high efficiency, large power output and small power output fluctuations.

Suggested Citation

  • Quentin Bouton & Jens Nettersheim & Sabrina Burgardt & Daniel Adam & Eric Lutz & Artur Widera, 2021. "A quantum heat engine driven by atomic collisions," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22222-z
    DOI: 10.1038/s41467-021-22222-z
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    Cited by:

    1. Sarmah, Manash Jyoti & Goswami, Himangshu Prabal, 2023. "Learning coherences from nonequilibrium fluctuations in a quantum heat engine," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 627(C).
    2. O. Onishchenko & G. Guarnieri & P. Rosillo-Rodes & D. Pijn & J. Hilder & U. G. Poschinger & M. Perarnau-Llobet & J. Eisert & F. Schmidt-Kaler, 2024. "Probing coherent quantum thermodynamics using a trapped ion," Nature Communications, Nature, vol. 15(1), pages 1-6, December.
    3. Kumar, Ashutosh & Lahiri, Sourabh & Bagarti, Trilochan & Banerjee, Subhashish, 2023. "Thermodynamics of one and two-qubit nonequilibrium heat engines running between squeezed thermal reservoirs," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 623(C).
    4. Villegas, Vladimir P. & Villagonzalo, Cristine D., 2022. "Refrigeration using magnetocaloric and electrocaloric effects in a Fermi–Hubbard optical dimer exposed to a heat bath," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 600(C).

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