Heat and work fluctuations for a harmonic oscillator
arXiv:1202.4257 · doi:10.1103/PhysRevE.85.021108
Abstract
The formalism of Kundu et al. [J. Stat. Mech. (2011) P03007], for computing the large deviations of heat flow in harmonic systems, is applied to the case of single Brownian particle in a harmonic trap and coupled to two heat baths at different temperatures. The large-t form of the moment generating function <exp[-sQ]> ~ g(s) exp[t m(s)], of the total heat flow Q from one of the baths to the particle in a given time interval t, is studied and exact explicit expressions are obtained for both m(s) and g(s). For a special case of the single particle problem that corresponds to the work done by an external stochastic force on a harmonic oscillator coupled to a thermal bath, the large-t form of the moment generating function is analyzed to obtain the exact large deviation function as well as the complete asymptotic forms of the probability density function of the work.
11 pages, 6 figures
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- Overdamped stochastic thermodynamics with multiple reservoirs
- Hidden entropy production by fast variables
- Stochastic thermodynamics of Langevin systems under time-delayed feedback control: II. Nonequilibrium steady-state fluctuations
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- Yielding and large deviations in micellar gels: a model