Can I read Active Brownian Heat Engines on EtoBox?

Active Brownian Heat Engines by Holubec, Viktor; Steffenoni, Stefano; Falasco, Gianmaria; Kroy, Klaus is a scholarly article available to read on EtoBox.

What is Active Brownian Heat Engines about?

When do non-equilibrium forms of disordered energy qualify as heat? \textcolor{blue}{We address this question in the context of cyclically operating heat engines in contact with a non-equilibrium energy reservoir that defies the zeroth law of thermodynamics. To consistently address the latter as a heat bath requires the existence of a precise mapping to an equivalent cycle with an equilibrium bath at a time-dependent effective temperature. We identify the most general setup for which this can generically be ascertained and thoroughly discuss an analytically tractable, experimentally relevant scenario}: a Brownian particle confined in a \textcolor{blue}{periodically} modulated harmonic potential and coupled to some non-equilibrium bath of variable activity. We deduce formal limitations for its thermodynamic performance, including maximum efficiency, efficiency at maximum power, and maximum efficiency at fixed power. They can guide the design of new micro-machines and clarify how much these can outperform passive-bath designs, which has been a debated issue for recent experimental realizations. To illustrate the general principles for practical quasi-static and finite-rate protocols,

Author

Holubec, Viktor; Steffenoni, Stefano; Falasco, Gianmaria; Kroy, Klaus

Published

2020

Language

EN