Crossover-Time in Quantum Boson and Spin Systems [electronic resource] / by Gennady P. Berman, Evgeny N. Bulgakov, Darryl D. Holm.

Method of Coherent States -- The Exact C-Number Equation for Time-Dependent Expectation Values in Coherent States -- Quasiclassical Perturbation Theory for Time-Dependent Expectation Values with Quantum Nonlinear Hamiltonians -- The Characteristic Times of Violation of Quasiclassical Approximation for Integrable Boson and Spin Systems -- Time-Scale ?? for a Kicked Quantum Nonlinear Oscillator -- The Time of Applicability of the Quasiclassical Approach in a Boson System of Two Interacting Quantum Nonlinear Resonances -- Two Interacting Quantum Nonlinear Resonances in a Spin System -- Quantization of a Stochastic Web -- Characteristic Times for Chaotic Dynamics in Wigner Representation -- Quantum Chaos of Atoms in a Resonant Cavity -- Quantum Chaos of Atoms in a Resonant Cavity Driven by an External Resonant Field -- Violation of the Semiclassical Approximation and Quantum Chaos in a Paramagnetic Spin System -- Weak Quantum Chaos in a System of N Atoms in a Resonant Cavity Interacting with an External Resonant Field -- Quantum Dynamics in Stationary Coherent States (SCS) -- Discussion.