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In the last two decades remarkable progress has been made in understanding and describing tunneling processes in complex systems in terms of classical trajectories. This book introduces recent concepts and achievements with particular emphasis on a dynamical formulation and relations to specific systems in mesoscopic, molecular, and atomic physics. Advanced instanton techniques, e.g. for decay rates and tunnel splittings, are discussed in the first part. The second part covers current developments for wave-packet tunneling in real-time, and the third part describes thermodynamics and dynamical approaches for barrier transmission in statistical, particularly dissipative systems.
Content Level »Research
Keywords »Fluctuation phenomena and noise - Helium-Atom-Streuung - Quantum rate theory - REM - Reaction dynamics - STEM - Semiclassical theory - Semiclassical tunneling - Tunneling in complex systems
Semiclassical Approximation.- Tunneling in the Energy Domain.- Wave-packet Tunneling in Real-time.- Tunneling in Open Systems: Thermodynamical Approaches.- Tunneling in Open Systems: Dynamics.- Unified Dynamical Theory -.- Final Remarks and Outlook.