Efficiency of a Quantum Otto Heat Engine Operating under a Reservoir at Effective Negative Temperatures.
Phys Rev Lett
; 122(24): 240602, 2019 Jun 21.
Article
em En
| MEDLINE
| ID: mdl-31322364
ABSTRACT
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Brasil