Experimental signature of initial quantum coherence on entropy production

Santiago Hernández-Gómez; Stefano Gherardini; Alessio Belenchia; Andrea Trombettoni; Mauro Paternostro; Nicole Fabbri

doi:10.1038/s41534-023-00738-0

Experimental signature of initial quantum coherence on entropy production

Santiago Hernández-Gómez^*, Stefano Gherardini, Alessio Belenchia, Andrea Trombettoni, Mauro Paternostro, Nicole Fabbri

^*Corresponding author for this work

School of Mathematics and Physics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

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Abstract

We report on the experimental quantification of the contribution to non-equilibrium entropy production stemming from the quantum coherence content in the initial state of a qubit exposed to both coherent driving and dissipation. Our experimental demonstration builds on the exquisite experimental control of the spin state of a nitrogen-vacancy defect in diamond and is underpinned, theoretically, by the formulation of a generalized fluctuation theorem designed to track the effects of quantum coherence. Our results provide significant evidence of the possibility to pinpoint the genuinely quantum mechanical contributions to the thermodynamics of non-equilibrium quantum processes in an open quantum systems scenario.

Original language	English
Article number	86
Number of pages	7
Journal	npj Quantum Information
Volume	9
DOIs	https://doi.org/10.1038/s41534-023-00738-0
Publication status	Published - 11 Sept 2023

ASJC Scopus subject areas

Computer Science (miscellaneous)
Statistical and Nonlinear Physics
Computer Networks and Communications
Computational Theory and Mathematics

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10.1038/s41534-023-00738-0Licence: CC BY

Experimental signature of initial quantum coherence on entropy production
© 2023 The Authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 724 KBLicence: CC BY

Cite this

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AU - Paternostro, Mauro

AU - Fabbri, Nicole

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AB - We report on the experimental quantification of the contribution to non-equilibrium entropy production stemming from the quantum coherence content in the initial state of a qubit exposed to both coherent driving and dissipation. Our experimental demonstration builds on the exquisite experimental control of the spin state of a nitrogen-vacancy defect in diamond and is underpinned, theoretically, by the formulation of a generalized fluctuation theorem designed to track the effects of quantum coherence. Our results provide significant evidence of the possibility to pinpoint the genuinely quantum mechanical contributions to the thermodynamics of non-equilibrium quantum processes in an open quantum systems scenario.

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Experimental signature of initial quantum coherence on entropy production

Abstract

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