Reversing the direction of heat flow using quantum correlations

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: NATURE COMMUNICATIONS; v. 10, JUN 5 2019.
• Citações Web of Science: 7

Resumo

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)

• Processo FAPESP: 16/08721-7 - Modelagem estocástica de sistemas quânticos fora do equilíbrio
• Beneficiário: Gabriel Teixeira Landi
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/12813-0 - Termodinâmica quântica de sistemas bosônicos
• Beneficiário: Gabriel Teixeira Landi
• Linha de fomento: Auxílio à Pesquisa - Regular