Quantum Kinetic Equations of Many-Particle Systems in Condensed States
  This paper is devoted to the description of the evolution of states of quantum many-particle systems within the framework of a one-particle density operator, which enables to construct the kinetic equations in scaling limits in the presence of correlations of particle states at initial time, for instance, correlations characterizing the condensed states. 
V.I. Gerasimenko, Zh.A. Tsvir
math-ph cond-mat.quant-gas cond-mat.stat-mech math.MP