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We investigate chaotic behavior in a 2D Hamiltonian system-oscillators with anharmonic coupling. We compare the classical system with quantum system. Via the quantum action, we construct Poincare sections and compute Lyapunov exponents for the quantum system. We find that the quantum system is globally less chaotic than the classical system. We also observe with increasing energy the distribution...
Quantum-mechanical kicked-rotator wave packets are studied using Bohmian mechanics and a novel numerical approach. A method for extending the results into the classical regime is developed. A clear physical picture of packet behavior, including a new expression for packet spread times, emerges.
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