Optimization of Asymmetric Quantum Otto Engine Cycles
- URL: http://arxiv.org/abs/2204.04782v1
- Date: Sun, 10 Apr 2022 22:22:28 GMT
- Title: Optimization of Asymmetric Quantum Otto Engine Cycles
- Authors: Rahul Shastri and B. Prasanna Venkatesh
- Abstract summary: We consider a finite-time quantum Otto heat engine cycle consisting of compression and expansion work strokes of unequal duration.
The asymmetry of the cycle is characterized by a parameter $r_u$ giving the ratio of the times for the compression and expansion work strokes.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We consider the optimization of the work output and fluctuations of a
finite-time quantum Otto heat engine cycle consisting of compression and
expansion work strokes of unequal duration. The asymmetry of the cycle is
characterized by a parameter $r_u$ giving the ratio of the times for the
compression and expansion work strokes. For such an asymmetric quantum Otto
engine cycle, with working substance chosen as a harmonic oscillator or a
two-level system, we find that the optimal values of $r_u$ maximising the work
output and the reliability (defined as the ratio of average work output to its
standard deviation) shows discontinuities as a function of the total time taken
for the cycle. Moreover we identify cycles of some specific duration where both
the work output and the reliability take their largest values for the same
value of the asymmetry parameter $r_u$.
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