Nonperturbative renormalization-group approach for quantum dissipative systems

Abstract

We analyze the dissipative quantum tunneling in the Caldeira-Leggett model by the nonperturbative renormalization-group method. We classify the dissipation effects by introducing the notion of effective cutoffs. We calculate the localization susceptibility to evaluate the critical dissipation for the quantum-classical transition. Our results are consistent with previous semiclassical arguments, but give considerably larger critical dissipation.

ReVTeX 10 pages, 10 eps figures; final version

References in corpus (1)

• Improving the Renormalization Group approach to the quantum-mechanical double well potential

Cited by in corpus (10)

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• Quantum-classical transition in the Caldeira-Leggett model
• Structure function of a damped harmonic oscillator
• Quantum-Classical Transition in Dissipative Double-Well Systems --A Numerical Study by a New Monte Carlo Scheme--
• Non-Perturbative Renormalization Group Analysis of the Ohmic Quantum Dissipation
• The $\theta$-vacuum from functional renormalisation