Optimal work fluctuations for finite-time and weak processes

Abstract

The optimal protocols for the irreversible work achieve their maximum usefulness if their work fluctuations are the smallest ones. In this work, for classical and isothermal processes subjected to finite-time and weak drivings, I show that the optimal protocol for the irreversible work is the same for the variance of work. This conclusion is based on the fluctuation-dissipation relation $\overline{W}=\Delta F+\beta {\sigma }_W^2/2$, extended now to finite-time and weak drivings. To illustrate it, I analyze a white noise overdamped Brownian motion subjected to an anharmonic stiffening trap for fast processes. By contrast with the already known results in the literature for classical systems, the linear-response theory approach of the work probabilistic distribution is not a Gaussian reduction.

arXiv comment4+1 pages, 3 figures

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• Degenerate optimal paths in thermally isolated systems
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Cited by in corpus (4)

• Generalised linear response theory for the full quantum work statistics
• Analytical solution for optimal protocols of weak drivings
• Minimal dissipation with viscoelastic baths in weakly driven processes
• Thermodynamic optimization equalities in weakly driven processes