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• W3012394020 abstract "The fast-forward (FF) scheme proposed by Masuda and Nakamura (textit{Proc. R. Soc. A} textbf{466}, 1135 (2010)) in the context of conservative quantum dynamics can reproduce a quasi-static dynamics in an arbitrarily short time. We apply the FF scheme to the classical stochastic Carnot-like heat engine which is driven by a Brownian particle coupled with a time-dependent harmonic potential and working between the high ($T_h$)- and low ($T_c$)-temperature heat reservoirs. Concentrating on the underdamped case where momentum degree of freedom is included, we find the explicit expressions for the FF protocols necessary to accelerate both the isothermal and thermally-adiabatic processes, and obtain the reversible and irreversible works. The irreversible work is shown to consist of two terms with one proportional to and the other inversely proportional to the friction coefficient. The optimal value of efficiency $eta$ at the maximum power of this engine is found to be $eta^*=frac{1}{2} left( 1+frac{1}{2}left(frac{T_c}{T_h}right)^{frac{1}{2}} - frac{5}{4}frac{T_c}{T_h} +Oleft(left(frac{T_c}{T_h}right)^{frac{3}{2}}right)right)$ and $eta^*= 1- left(frac{T_c}{T_h}right)^{frac{1}{2}}$, respectively in the cases of strong and weak dissipation. The result is justified for a wide family of time scaling functions, making the FF protocols very flexible. We also revealed that the accelerated full cycle of the Carnot-like stochastic heat engine cannot be conceivable within the framework of the overdamped case, and the power and efficiency can be evaluated only when the momentum degree of freedom is taken into consideration." @default.
• W3012394020 created "2020-03-23" @default.
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• W3012394020 date "2020-07-13" @default.
• W3012394020 modified "2023-10-15" @default.
• W3012394020 title "Fast-forward approach to stochastic heat engine" @default.
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• W3012394020 doi "https://doi.org/10.1103/physreve.102.012129" @default.
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