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2009 | 7 | 3 | 472-478

Article title

Fluctuation theorems from non-equilibrium Onsager-Machlup theory for a Brownian particle in a time-dependent harmonic potential


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We discuss the case of a Brownian particle which is harmonically bound and multiplicatively forced-namely bound by V(x,t)=1/2 a(t)x
2 where a(t)is externally controlled-as another instance that provides a generalization of Onsager-Machlup’s theory to non-equilibrium states, thus allowing establishment of several fluctuation theorems. In particular, we outline the derivation of a fluctuation theorem for work, through the calculation of the work probability distribution as a functional integral over stochastic trajectories.


  • IFIMAR (Universidad Nacional de Mar del Plata and CONICET), Deán Funes 3350, 7600, Mar del Plata, Argentina
  • IFIMAR (Universidad Nacional de Mar del Plata and CONICET), Deán Funes 3350, 7600, Mar del Plata, Argentina
  • IFCA (Universidad de Cantabria and CSIC), Av. de los Castros s/n, E-39005, Santander, Spain


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