Anomalous Brownian Refrigerator
Shubhashis Rana, P. S. Pal, Arnab Saha, A. M. Jayannavar

TL;DR
This paper analyzes a Brownian particle in a harmonic potential operating as a stochastic refrigerator, heater, or heat engine depending on cycle parameters, revealing complex fluctuation behaviors and non-universal efficiency distributions.
Contribution
It provides a comprehensive analytical study of a Brownian refrigerator that can also function as a heater or heat engine, highlighting fluctuation effects and non-universality.
Findings
System can act as a refrigerator, heater, or heat engine depending on parameters.
Efficiency and COP fluctuations have power-law tails with non-universal exponents.
Operation as an engine is unreliable with non-trivial fluctuation dominance.
Abstract
We present a detailed study of a Brownian particle driven by Carnot-type refrigerating protocol operating between two thermal baths. Both the underdamped as well as the overdamped limits are investigated. The particle is in a harmonic potential with time-periodic strength that drives the particle cyclically between the baths. Each cycle consists of two isothermal steps at different temperatures and two adiabatic steps connecting them. Besides working as a stochastic refrigerator, it is shown analytically that in the quasistatic regime the system can also act as stochastic heater, depending on the bath temperatures. Interestingly, in non-quasistatic regime, our system can even work as a stochastic heat engine for certain range of cycle time and bath temperatures. We show that the operation of this engine is not reliable. The fluctuations of stochastic efficiency/coefficient of…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAdvanced Thermodynamics and Statistical Mechanics · Thermal Radiation and Cooling Technologies · Quantum Electrodynamics and Casimir Effect
