Transport Fluctuations in Pauli - Fierz Models: the Role of Master Equations
2008, v.14, Issue 3, 427-444
We review some results on transport fluctuations in system-reservoir models. The emphasis is on the role of quantum master equations, or, equivalently, of semigroup generators. Where the traditional weak coupling generator shows the correct leading order of system dynamics, the deformed generators show the correct leading order of energy transport fluctuations.
Keywords: weak coupling limit,current fluctuations,nonequilibriumstatistical mechanics,Pauli - Fierz model,quantum master equation