Journal
PHYSICAL REVIEW E
Volume 100, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.100.012122
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Funding
- EPSRC [EP/P030815/1]
- National Science Foundation [NSF PHY-1748958]
- EPSRC [EP/P030815/1] Funding Source: UKRI
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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.
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