Efficiency of a Quantum Otto Heat Engine Operating under a Reservoir at Effective Negative Temperatures

被引：108

作者：

de Assis, Rogerio J. ^{[1
]}

de Mendonca, Taysa M. ^{[2
]}

Villas-Boas, Celso J. ^{[2
]}

de Souza, Alexandre M. ^{[3
]}

Sarthour, Roberto S. ^{[3
]}

Oliveira, Ivan S. ^{[3
]}

de Almeida, Norton G. ^{[1
]}

机构：

[1] Univ Fed Goias, Inst Fis, BR-74001970 Goiania, Go, Brazil

[2] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, Brazil

[3] Ctr Brasileiro Pesquisas Fis, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, RJ, Brazil

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 122卷 / 24期

基金：

巴西圣保罗研究基金会;

关键词：

41;

D O I：

10.1103/PhysRevLett.122.240602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform an experiment in which a quantum heat engine works under two reservoirs, one at a positive spin temperature and the other at an effective negative spin temperature, i.e., when the spin system presents population inversion. We show that the efficiency of this engine can be greater than that when both reservoirs are at positive temperatures. We also demonstrate the counterintuitive result that the Otto efficiency can be beaten only when the quantum engine is operating in the finite-time mode.

引用

页数：5

共 39 条

[11] Dunkel J, 2014, NAT PHYS, V10, P67, DOI [10.1038/NPHYS2815, 10.1038/nphys2815]
[12] Gibbs, Boltzmann, and negative temperatures
Frenkel, Daan
Warren, Patrick B.
[J]. AMERICAN JOURNAL OF PHYSICS, 2015, 83 (02) : 163 - 170
[13] Minimal universal quantum heat machine
Gelbwaser-Klimovsky, D.
Alicki, R.
Kurizki, G.
[J]. PHYSICAL REVIEW E, 2013, 87 (01):
[14] Gemmer J, 2009, LECT NOTES PHYS, V784, P1
[15] A QUANTUM-MECHANICAL HEAT ENGINE OPERATING IN FINITE-TIME - A MODEL CONSISTING OF SPIN-1/2 SYSTEMS AS THE WORKING FLUID
GEVA, E
KOSLOFF, R
[J]. JOURNAL OF CHEMICAL PHYSICS, 1992, 96 (04) : 3054 - 3067
[16] Relaxation to Negative Temperatures in Double Domain Systems
Hama, Yusuke
Munro, William J.
Nemoto, Kae
[J]. PHYSICAL REVIEW LETTERS, 2018, 120 (06)
[17] Thermodynamic laws in isolated systems
Hilbert, Stefan
Haenggi, Peter
Dunkel, Joern
[J]. PHYSICAL REVIEW E, 2014, 90 (06):
[18] The second law, Maxwell's demon, and work derivable from quantum heat engines
Kieu, TD
[J]. PHYSICAL REVIEW LETTERS, 2004, 93 (14) : 140403 - 1
[19] Squeezed Thermal Reservoirs as a Resource for a Nanomechanical Engine beyond the Carnot Limit
Klaers, Jan
Faelt, Stefan
Imamoglu, Atac
Togan, Emre
[J]. PHYSICAL REVIEW X, 2017, 7 (03):
[20] State interrogation in nuclear magnetic resonance quantum-information processing
Leskowitz, GM
Mueller, LJ
[J]. PHYSICAL REVIEW A, 2004, 69 (05): : 052302 - 1

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