Brownian yet non-Gaussian thermal machines

I. Iyyappan, Jetin E. Thomas, Sibasish Ghosh

Published 2023-07-22Version 1

We investigate the performance of a Brownian thermal machine working in a heterogeneous heat bath. The mobility of the heat bath fluctuates and it is modelled as an Ornstein Uhlenbeck process. We trap the Brownian particle with time-dependent harmonic potential and by changing the stiffness coefficient and bath temperatures, we perform a Stirling cycle. We numerically calculate the average absorbed work, the average ejected heat and the performance of the heat pump. For shorter cycle times, we find that the performance of a Brownian yet non-Gaussian heat pump is significantly higher than the normal (Gaussian) heat pump. We numerically find the coefficient of performance at maximum heating power.