Mapping between dissipative and Hamiltonian systems
Abstract
Theoretical studies of nonequilibrium systems are complicated by the lack of a general framework. In this work we first show that a transformation recently introduced by Ao (2004 J. Phys. A: Math. Gen. 37 L25) is related to previous works of Graham (1977 Z. Phys. B 26 397) and Eyink et al (1996 J. Stat. Phys. 83 385), which can also be viewed as the generalized application of the Helmholtz theorem in vector calculus. We then show that systems described by ordinary stochastic differential equations with white noise can be mapped to thermostated Hamiltonian systems. A steadystate of a dissipative system corresponds to the equilibrium state of the corresponding Hamiltonian system. These results provide a solid theoretical ground for corresponding studies on nonequilibrium dynamics, especially on nonequilibrium steady state. Mapping permits the application of established techniques and results for Hamiltonian systems to dissipative nonHamiltonian systems, those for thermodynamic equilibrium states to nonequilibrium steady states. We discuss several implications of this work.
 Publication:

Journal of Physics A Mathematical General
 Pub Date:
 September 2010
 DOI:
 10.1088/17518113/43/37/375003
 arXiv:
 arXiv:0908.4526
 Bibcode:
 2010JPhA...43K5003X
 Keywords:

 Condensed Matter  Statistical Mechanics
 EPrint:
 18 pages, no figure. final version for publication on J. Phys. A: Math &