Ebook: Crossover-time in quantum boson and spin systems

1. Introduction -- 2. Method of Coherent States -- 3. The Exact C-Number Equation for Time-Dependent Expectation Values in Coherent States -- 4. Quasiclassical Perturbation Theory for Time-Dependent Expectation Values with Quantum Nonlinear Hamiltonians -- 5. The Characteristic Times of Violation of Quasiclassical Approximation for Integrable Boson and Spin Systems -- 6. Time-Scale [actual symbol not reproducible] for a Kicked Quantum Nonlinear Oscillator -- 7. The Time of Applicability of the Quasiclassical Approach in a Boson System of Two Interacting Quantum Nonlinear Resonances -- 8. Two Interacting Quantum Nonlinear Resonances in a Spin System -- 9. Quantization of a Stochastic Web -- 10. Characteristic Times for Chaotic Dynamics in Wigner Representation -- 11. Quantum Chaos of Atoms in a Resonant Cavity -- 12. Quantum Chaos of Atoms in a Resonant Cavity Driven by an External Resonant Field -- 13. Violation of the Semiclassical Approximation and Quantum Chaos in a Paramagnetic Spin System. 14. Weak Quantum Chaos in a System of N Atoms in a Resonant Cavity Interacting with an External Resonant Field -- 15. Quantum Dynamics in Stationary Coherent States (SCS) -- 16. Discussion