期刊
NEW JOURNAL OF PHYSICS
卷 17, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/17/7/075007
关键词
inner friction; Otto cycle; quantum thermodynamic
资金
- FIRB [RBFR12NLNA]
- EU
- MICINN
- CSIC
- FEDER [FIS2011-23526, FIS2014-60343-P]
- postdoctoral JAE program (ESF)
- FET-proactive project QuProCS
- COST Action [MP1209]
- UIB for Invited Professors program
The concept of inner friction, by which a quantum heat engine is unable to follow adiabatically its strokes and thus dissipates useful energy, is illustrated in an exact physical model where the working substance consists of an ensemble of misaligned spins interacting with a magnetic field and performing the Otto cycle. The effect of this static disorder under a finite-time cycle gives a new perspective of the concept of inner friction under realistic settings. We investigate the efficiency and power of this engine and relate its performance to the amount of friction from misalignment and to the temperature difference between heat baths. Finally we propose an alternative experimental implementation of the cycle where the spin is encoded in the degree of polarization of photons.
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