Unified Statistical Description of Quasithermodynamic Systems in and out of Equilibrium

Abstract

We propose the method of statistical description of broad class of dynamic systems (DS) whose equations of motion are determined by two state depending functions: 1) "energy" - the quantity which conserves in time and 2) "entropy" - the quantity which does not decrease in time. It is demonstrated that the behavior of such systems in the equilibrium state reduces to the thermodynamic lows in particular the Le Chatelier principle is satisfed and so on. Taking into account the interaction system of interest with ergometer - the device which continuously measures its energy one can possible to find the system distribution function in arbitrary non-equilibrium stationary state (NESS). Some general relations for mean values of certain quantities in NESS which can be compared with experimental data are obtained.