Journal article
Revealing missing charges with generalised quantum fluctuation relations
- Abstract:
- The non-equilibrium dynamics of quantum many-body systems is one of the most fascinating problems in physics. Open questions range from how they relax to equilibrium to how to extract useful work from them. A critical point lies in assessing whether a system has conserved quantities (or ‘charges’), as these can drastically influence its dynamics. Here we propose a general protocol to reveal the existence of charges based on a set of exact relations between out-of-equilibrium fluctuations and equilibrium properties of a quantum system. We apply these generalised quantum fluctuation relations to a driven quantum simulator, demonstrating their relevance to obtain unbiased temperature estimates from non-equilibrium measurements. Our findings will help guide research on the interplay of quantum and thermal fluctuations in quantum simulation, in studying the transition from integrability to chaos and in the design of new quantum devices.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 793.9KB, Terms of use)
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- Publisher copy:
- 10.1038/s41467-018-04407-1
Authors
+ Federación Española de Enfermedades Raras
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- Grant:
- FIS2015-70856-P,FIS2012-35316,F IS2015-63770-P
- FIS2014-61633-EXP
+ Ministry of Economy and Competitiveness (MINECO), Spain
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- Grant:
- FIS2015-70856-P,FIS2012-35316,F IS2015-63770-P
- FIS2014-61633-EXP
+ European Union
More from this funder
- Grant:
- Seventh Framework Programme QMAC (Grant Agreement No. 319286
- Publisher:
- Springer Nature
- Journal:
- Nature Communications More from this journal
- Volume:
- 9
- Article number:
- 2006
- Publication date:
- 2018-05-22
- Acceptance date:
- 2018-04-06
- DOI:
- EISSN:
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2041-1723
- Keywords:
- Pubs id:
-
pubs:833964
- UUID:
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uuid:8cdf6bb9-17ea-40d1-bbe4-574869d9e526
- Local pid:
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pubs:833964
- Source identifiers:
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833964
- Deposit date:
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2018-04-06
Terms of use
- Copyright holder:
- Mur-Petit et al
- Copyright date:
- 2018
- Notes:
- This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Licence:
- CC Attribution (CC BY)
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