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|Type:||Artigo de periódico|
|Title:||DIFFUSION AND MOBILITY AND GENERALIZED EINSTEIN RELATION|
|Abstract:||The general response theory to thermal perturbations presented in the preceding paper is applied to a simple model. We obtain the evolution equation for the particle density, which becomes of the form of a propagating wave with a damping dependent on the diffusion coefficient. The latter is calculated at the microscopic level. For a charged system we also determine the mobility coefficient for arbitrarily intense electric fields, obtaining a generalized Ohm's law for nonlinear charge transport. Using the expressions for both transport coefficients we derive the Einstein relation in the nonlinear nonequilibrium thermodynamic state of the system.|
|Editor:||Elsevier Science Bv|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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