Underdamped stochastic heat engine at maximum efficiency

@article{Dechant2016UnderdampedSH,
  title={Underdamped stochastic heat engine at maximum efficiency},
  author={Andreas Dechant and Nikolai Kiesel and Eric Lutz},
  journal={arXiv: Statistical Mechanics},
  year={2016}
}
We investigate the performance of an underdamped stochastic heat engine for a time-dependent harmonic oscillator. We analytically determine the optimal protocol that maximizes the efficiency at fixed power. The maximum efficiency reduces to the Curzon-Ahlborn formula at maximum power and the Carnot formula at zero power. We further establish that the efficiency at maximum power is universally given by the Curzon-Ahlborn efficiency in the weakly damped regime. Finally, we show that even small… 
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