3 papers
math-ph2025
Cumulant expansions of operator groups of quantum many-particle systems
V. I. Gerasimenko, I. V. Gapyak
The article presents a method of cluster expansions for groups of operators associated with the von Neumann equations for states and the Heisenberg equations for observables, aimin…
math-ph2025
Cluster expansions of particle system state with topological nearest-neighbor interaction
V. I. Gerasimenko, I. V. Gapyak
The article presents the concept of a cumulant representation for distribution functions describing the states of many-particle systems with topological nearest-neighbor interactio…
math-ph2024
Non-perturbative solutions of hierarchies of evolution equations for colliding particles
V. I. Gerasimenko, I. V. Gapyak
The article deals with the challenge of the construction of solutions to hierarchies of fundamental evolution equations for many colliding particles. The method of cluster expansio…