Easy access to energy fluctuations in nonequilibrium quantum many-body systems

Abstract

We combine theoretical and experimental efforts to propose a method for studying energy fluctuations, in particular, to obtain the related bistochastic matrix of transition probabilities by means of simple measurements at the end of a protocol that drives a many-body quantum system out of equilibrium. This scheme is integrated with numerical optimizations in order to ensure a proper analysis of the experimental data, leading to physical probabilities. The method is experimentally evaluated employing a two interacting spin- system in a nuclear magnetic resonance setup. We show how to recover the transition probabilities using only local measures, which enables an experimental verification of the detailed fluctuation theorem in a many-body system driven out of equilibrium.

Metadata

Item Type:	Article
Authors/Creators:	Herrera, Marcela Peterson, John P. S Serra, Roberto M. D’Amico, Irene
Copyright, Publisher and Additional Information:	Funding Information: We thank the Multiuser Central Facilities of Universidade Federal do ABC (UFABC) for the technical support. We acknowledge financial support from UFABC, CNPq, CAPES, FAPESP, and the Royal Society (Grant No. NA140436). J. P. S. P. is thankful for support from Innovation, Science and Economic Development Canada, the Government of Ontario, and CIFAR. This research was performed as part of the Brazilian National Institute of Science and Technology for Quantum Information (INCT-IQ). Funding Information: Universidade Federal do ABC Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior Funda??o de Amparo ? Pesquisa do Estado de S?o Paulo Royal Society Innovation, Science and Economic Development Canada Government of Ontario Canadian Institute for Advanced Research Instituto de Ci?ncia e Tecnologia de Nanomateriais de Carbono Instituto Nacional de Ci?ncia e Tecnologia de Informa??o Qu?ntica Publisher Copyright: © 2021 American Physical Society
Dates:	Published: 16 July 2021 Accepted: 9 June 2021
Institution:	The University of York
Academic Units:	The University of York > Faculty of Sciences (York) > Physics (York)
Depositing User:	Pure (York)
Date Deposited:	23 Jun 2021 15:00
Last Modified:	16 Oct 2024 17:39
Published Version:	https://doi.org/10.1103/PhysRevLett.127.030602
Status:	Published
Refereed:	Yes
Identification Number:	10.1103/PhysRevLett.127.030602
Related URLs:	http://www.scopus.com/inward/record.url?... https://arxiv.org/pdf/2010.03752.pdf
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:175537

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Description: Easy access to energy fluctuations in non-equilibrium quantum many-body systems

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Easy access to energy fluctuations in nonequilibrium quantum many-body systems

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