Journal
JOURNAL OF APPLIED PHYSICS
Volume 113, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4799795
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Funding
- National Natural Science Foundation [11175148]
- 973 Program [2012CB619301]
- Specialized Research Fund for the Doctoral Program of Higher Education, People's Republic of China [20100121110024]
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A weak-dissipation cycle model of two-level quantum Carnot engines is proposed by adopting a generic energy spectrum and the superposition effect of quantum systems. Expressions for the power output and efficiency of the cycle are derived. The optimal relation between the power output and the efficiency is obtained and the optimally operating region of the cycle is determined. Moreover, analytical expression for the efficiency of the cycle at the maximum power output is deduced and the lower and upper bounds of the efficiency at the maximum power output are given. The results obtained are general and can be directly used to discuss the optimal performance characteristics of several types of two-level quantum Carnot engines. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4799795]
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