Correlations As a Resource in Quantum Thermodynamics

Overview

Journal Nat Commun

Specialty Biology

Date 2019 Jun 9

PMID 31175297

Citations 4

Authors

Facundo Sapienza

Federico Cerisola

Augusto J Roncaglia

Affiliations

Soon will be listed here.

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.

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