Efficiency of a cyclic quantum heat engine with finite-size baths.
basic_science · Level V
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- Record sourced from PubMed, PMID 31499920.
- Also identified by DOI 10.1103/PhysRevE.100.012122.
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Abstract
In this paper we investigate the relationship between the efficiency of a cyclic quantum heat engine with the Hilbert space dimension of the thermal baths. By means of a general inequality, we show that the Carnot efficiency can be obtained only when both the hot and cold baths are infinitely large. By further introducing a specific model where the baths are constituted of ensembles of finite-dimensional particles, we further demonstrate the relationship between the engine's power and efficiency, with the dimension of the working substance and the bath particles.