X-probability and Irreversibility Paradox

Abstract

Based on the general thought that mechanics cannot be absolutely exact, supported by pulsed nuclear magnetic resonance (NMR) experiments on the reversal of time in spin systems, we postulate existence of a probability which do not follow from the Schroudinger equation, or X-probability. It is shown that the X-probability allows explain irreversibility of evolution of macrosystems, and also creates a basis for using probabilistic methods in statistical mechanics and for deliverance from the mechanical determinism.