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Volumn 82, Issue 2, 2010, Pages

Exact nonequilibrium work generating function for a small classical system

Author keywords

[No Author keywords available]

Indexed keywords

BROWNIAN PARTICLES; CLASSICAL SYSTEMS; EXTERNAL WORK; FINITE TIME INTERVALS; GENERATING FUNCTIONS; JARZYNSKI EQUALITY; NONEQUILIBRIUM WORK; SMALL SYSTEMS;

EID: 77955593698     PISSN: 15393755     EISSN: 15502376     Source Type: Journal    
DOI: 10.1103/PhysRevE.82.021112     Document Type: Article
Times cited : (15)

References (41)
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    • note
    • An example of such a potential is that of an instantaneously switched-on constant force f (t): for t < 0, there is no potential energy, while for t > 0 a potential energy - f 0 x arises. For instance, this can be thought as the energy of a very small bare electric charge placed in the inside of charged capacitor plates, with plates orthogonal to the x axis. The charging of the capacitors happens almost instantly at t = 0, and we assume that the plates were grounded at t < 0. In fact, the external work done by the force, described by the equation above, corresponds to the work done by the batteries in order to initially charge the capacitors up to a fixed voltage (part of that work shifts the particles potential energy and the remaining is used to create the electric field between the plates), producing a constant force upon the particle. It has the effect of shifting the initial potential energy of the charged particle by an amount - f 0 x 0, where x 0 is the initial position of the charged particle (if we include the batteries within the system, then the potential energy they provide is taken to be internal). That external work is then given by consistent with references. The important point to be consistent with is that the external work is the one changing the energy landscape for the phase-space point. In contrast, if we keep the batteries as an external agent for all t, then the total external work is given by (x, t) = - f (t) xi - f 0 Θ (t) x. W ext, 0 = - f 0 x 0 = - t 1 < 0 t 2 > 0 d t f 0 Θ (t) x t, W ext = - f 0 (x t 2 - x 0) + W ext, 0 = - f 0 x t 2. The definition of what is the internal Hamiltonian, and what is external, is crucial as to which Work Fluctuation relation can be derived.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.