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Reversing the direction of heat flow using quantum correlations

Author

Listed:
  • Kaonan Micadei

    (Universidade Federal do ABC
    University of Stuttgart)

  • John P. S. Peterson

    (Centro Brasileiro de Pesquisas Físicas)

  • Alexandre M. Souza

    (Centro Brasileiro de Pesquisas Físicas)

  • Roberto S. Sarthour

    (Centro Brasileiro de Pesquisas Físicas)

  • Ivan S. Oliveira

    (Centro Brasileiro de Pesquisas Físicas)

  • Gabriel T. Landi

    (Universidade de São Paulo)

  • Tiago B. Batalhão

    (Singapore University of Technology and Design
    National University of Singapore)

  • Roberto M. Serra

    (Universidade Federal do ABC
    University of York)

  • Eric Lutz

    (University of Stuttgart)

Abstract

Heat spontaneously flows from hot to cold in standard thermodynamics. However, the latter theory presupposes the absence of initial correlations between interacting systems. We here experimentally demonstrate the reversal of heat flow for two quantum correlated spins-1/2, initially prepared in local thermal states at different effective temperatures, employing a Nuclear Magnetic Resonance setup. We observe a spontaneous energy flow from the cold to the hot system. This process is enabled by a trade off between correlations and entropy that we quantify with information-theoretical quantities. These results highlight the subtle interplay of quantum mechanics, thermodynamics and information theory. They further provide a mechanism to control heat on the microscale.

Suggested Citation

  • Kaonan Micadei & John P. S. Peterson & Alexandre M. Souza & Roberto S. Sarthour & Ivan S. Oliveira & Gabriel T. Landi & Tiago B. Batalhão & Roberto M. Serra & Eric Lutz, 2019. "Reversing the direction of heat flow using quantum correlations," Nature Communications, Nature, vol. 10(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10333-7
    DOI: 10.1038/s41467-019-10333-7
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    Cited by:

    1. Santos, Jonas F.G. & Vieira, Carlos H.S. & Dieguez, Pedro R., 2021. "Negativity-mutual information conversion and coherence in two-coupled harmonic oscillators," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 579(C).

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