Quantum Stirling heat engine with squeezed thermal reservoir
- URL: http://arxiv.org/abs/2210.00250v2
- Date: Mon, 10 Oct 2022 02:37:42 GMT
- Title: Quantum Stirling heat engine with squeezed thermal reservoir
- Authors: Nikolaos Papadatos
- Abstract summary: We analyze the performance of a quantum Stirling heat engine (QSHE) that contacts with a squeezed thermal reservoir and a cold reservoir.
We prove that the effect of squeezing heats the working medium to a higher effective temperature which leads to better overall performance.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We analyze the performance of a quantum Stirling heat engine (QSHE), using a
two level system and the harmonic oscillator as the working medium, that
contacts with a squeezed thermal reservoir and a cold reservoir. First, we
derive closed-form expressions for the produced work and efficiency which
strongly depends on the squeezing parameter $r_h$. Then, we prove that the
effect of squeezing heats the working medium to a higher effective temperature
which leads to better overall performance. In particular, the efficiency
increases with the degree of squeezing surpassing the standard Carnot limit,
when the ratio of temperatures of hot and cold reservoir is small. Furthermore,
we derive the analytical expressions for the efficiency at maximum work and the
maximum produced work in the high and low temperature regime and we find that
at extreme temperatures the squeezing parameter $r_h$ does not affect the
performance of the QSHE. Finally, the performance of the QSHE depends on the
nature of the working medium.
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