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Correlations as a resource in quantum thermodynamics

Author

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  • Facundo Sapienza

    (Universidad de Buenos Aires)

  • Federico Cerisola

    (Universidad de Buenos Aires
    CONICET)

  • Augusto J. Roncaglia

    (Universidad de Buenos Aires
    CONICET)

Abstract

The presence of correlations in physical systems can be a valuable resource for many quantum information tasks. They are also relevant in thermodynamic transformations, and their creation is usually associated to some energetic cost. In this work, we study the role of correlations in the thermodynamic process of state formation in the single-shot regime, and find that correlations can also be viewed as a resource. First, we show that the energetic cost of creating multiple copies of a given state can be reduced by allowing correlations in the final state. We obtain the minimum cost for every finite number of subsystems, and then we show that this feature is not restricted to the case of copies. More generally, we demonstrate that in the asymptotic limit, by allowing a logarithmic amount of correlations, we can recover standard results where the free energy quantifies this minimum cost.

Suggested Citation

  • Facundo Sapienza & Federico Cerisola & Augusto J. Roncaglia, 2019. "Correlations as a resource in quantum thermodynamics," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10572-8
    DOI: 10.1038/s41467-019-10572-8
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    Cited by:

    1. Gomes, V.S. & Dieguez, P.R. & Vasconcelos, H.M., 2022. "Realism-based nonlocality: Invariance under local unitary operations and asymptotic decay for thermal correlated states," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 601(C).

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