Kramers Equation and Supersymmetry |
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Authors: | Julien Tailleur Sorin Tănase-Nicola Jorge Kurchan |
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Institution: | (1) PMMH UMR 7636 CNRS-ESPCI, 10, Rue Vauquelin, 75231 Paris Cedex 05, France;(2) Present address: FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands |
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Abstract: | Hamilton’s equations with noise and friction possess a hidden supersymmetry, valid for time-independent as well as periodically
time-dependent systems. It is used to derive topological properties of critical points and periodic trajectories in an elementary
way. From a more practical point of view, the formalism provides new tools to study the reaction paths in systems with separated
time scales. A ‘reduced current’ which contains the relevant part of the phase space probability current is introduced, together
with strategies for its computation. |
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Keywords: | Kramers equation Supersymmetry Reaction paths Morse theory Stochastic methods |
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