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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Reversing the direction of heat flow using quantum correlations

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Author(s):
Micadei, Kaonan [1, 2] ; Peterson, John P. S. [3] ; Souza, Alexandre M. [3] ; Sarthour, Roberto S. [3] ; Oliveira, Ivan S. [3] ; Landi, Gabriel T. [4] ; Batalhao, Tiago B. [5, 6] ; Serra, Roberto M. [7, 1] ; Lutz, Eric [2]
Total Authors: 9
Affiliation:
[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Ave Estados 5001, BR-09210580 Sao Paulo - Brazil
[2] Univ Stuttgart, Inst Theoret Phys 1, D-70550 Stuttgart - Germany
[3] Ctr Brasileiro Pesquisas Fis, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, RJ - Brazil
[4] Univ Sao Paulo, Inst Fis, CP 66318, BR-05315970 Sao Paulo, SP - Brazil
[5] Singapore Univ Technol & Design, 8 Somapah Rd, Singapore 487372 - Singapore
[6] Natl Univ Singapore, Ctr Quantum Technol, 3 Sci Dr 2, Singapore 117543 - Singapore
[7] Univ York, Dept Phys, York YO10 5DD, N Yorkshire - England
Total Affiliations: 7
Document type: Journal article
Source: NATURE COMMUNICATIONS; v. 10, JUN 5 2019.
Web of Science Citations: 7
Abstract

Heat spontaneously flows from hot to cold in standard thermodynamics. However, the latter theory presupposes the absence of initial correlations between interacting systems. We here experimentally demonstrate the reversal of heat flow for two quantum correlated spins-1/2, initially prepared in local thermal states at different effective temperatures, employing a Nuclear Magnetic Resonance setup. We observe a spontaneous energy flow from the cold to the hot system. This process is enabled by a trade off between correlations and entropy that we quantify with information-theoretical quantities. These results highlight the subtle interplay of quantum mechanics, thermodynamics and information theory. They further provide a mechanism to control heat on the microscale. (AU)

FAPESP's process: 16/08721-7 - Stochastic modeling of non-equilibrium quantum systems
Grantee:Gabriel Teixeira Landi
Support Opportunities: Regular Research Grants
FAPESP's process: 18/12813-0 - Quantum thermodynamics of bosonic systems
Grantee:Gabriel Teixeira Landi
Support Opportunities: Regular Research Grants