Many-body problem 17 Quantum mechanics; Physics 8 Perturbation (Quantum dynamics) 3 Quantum theory 3 Monte Carlo method 2 Quantum chemistry 2 Quantum field theory 2 Quantum statistics 2 Astrophysics; Descriptive astronomy 1 Cluster theory (Nuclear physics) 1 Condensed matter 1 Congresses 1 Electronic structure 1 Electrons 1 High Energy Gamma Ray Production in Heavy Ion Reactions 1 Liquid helium 1 Many - body problem 1 Many-body problem--Approximation methods 1 Mathematical models 1 Nuclear matter 1 Nuclear models 1 Nuclear physics 1 Particles (Nuclear physics) 1 Solid state physics 1 Statistical mechanics 1 Superfluidity 1 The Relativistic Nuclear Many-Body Problem 1