Annotation
A system of equations is derived for Bogolyubov statistical particle operators on connected clusters that makes it possible to construct a unified perturbation theory for the homogeneous and the ordered phases irrespective of the type of symmetry of a many-particle system.
© 2016 Publisher M.V.Lomonosov Moscow State University
Authors
I.P. Bazarov, P.N. Nikolaev
Department of Quantum Statistics and Field Theory, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
Department of Quantum Statistics and Field Theory, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia