Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/243788
Type: Artigo
Title: Degenerate optimal paths in thermally isolated systems
Author: Acconcia, Thiago V.
Bonança, Marcus V. S.
Abstract: We present an analysis of the work performed on a system of interest that is kept thermally isolated during the switching of a control parameter. We show that there exists, for a certain class of systems, a finite-time family of switching protocols for which the work is equal to the quasistatic value. These optimal paths are obtained within linear response for systems initially prepared in a canonical distribution. According to our approach, such protocols are composed of a linear part plus a function which is odd with respect to time reversal. For systems with one degree of freedom, we claim that these optimal paths may also lead to the conservation of the corresponding adiabatic invariant. This points to an interesting connection between work and the conservation of the volume enclosed by the energy shell. To illustrate our findings, we solve analytically the harmonic oscillator and present numerical results for certain anharmonic examples.
We present an analysis of the work performed on a system of interest that is kept thermally isolated during the switching of a control parameter. We show that there exists, for a certain class of systems, a finite-time family of switching protocols for which the work is equal to the quasistatic value. These optimal paths are obtained within linear response for systems initially prepared in a canonical distribution. According to our approach, such protocols are composed of a linear part plus a function which is odd with respect to time reversal. For systems with one degree of freedom, we claim that these optimal paths may also lead to the conservation of the corresponding adiabatic invariant. This points to an interesting connection between work and the conservation of the volume enclosed by the energy shell. To illustrate our findings, we solve analytically the harmonic oscillator and present numerical results for certain anharmonic examples.
Subject: Osciladores harmônicos
Termodinâmica
Energia livre
Country: Estados Unidos
Editor: American Physical Society
Citation: Degenerate Optimal Paths In Thermally Isolated Systems. Amer Physical Soc, v. 91, p. APR-2015.
Rights: aberto
Identifier DOI: 10.1103/PhysRevE.91.042141
Address: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.91.042141
Date Issue: 2015
Appears in Collections:IFGW - Artigos e Outros Documentos

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