Mathematical description of quantum systems by the method of reduced density matrices of a canonical ensemble

The mathematical description of quantum systems by reduced density matrices of a canonical ensemble

Method of m-particle density matrices of the canonical ensemble in the description of states of quantum systems

Mathematical description of the states of bose and fermi systems by the method of partial density matrices of the canonical ensemble

Description of States in Quantum Mechanics by Density Matrix and Operator Techniques

Reduced density matrices of a system of N coupled oscillators 2. eigenstructure of the 1-particle matrix for the canonical ensemble

DENSITY MATRICES IN QUANTUM MECHANICS