Quantum-Classical Transition in Dissipative Double-Well Systems --A Numerical Study by a New Monte Carlo Scheme--

Abstract

Thermodynamics of dissipative quantum systems with double-well potentials is studied by the path-integral Monte Carlo (PIMC) method without truncation to the two-state model. For efficient simulation at low temperatures, we develop a new scheme of local update based on approximate decomposition of the Boltzmann weight to the Gaussian distributions. Localization transition induced by ohmic dissipation is clarified numerically for arbitrary potential barriers.

4 pages, 4 figures, submitted to JPSJ letters

References in corpus (8)

• Recent Developments of World-Line Monte Carlo Methods
• Criticality in one dimension with inverse square-law potentials
• A cluster algorithm for resistively shunted Josephson junctions
• Superconductor-insulator quantum phase transition in a single Josephson junction
• Temperature Dependence of Zero-Bias Resistances of a Single Resistance-Shunted Josephson Junction
• Cluster Monte Carlo Algorithms for Dissipative Quantum Systems
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Cited by in corpus (3)

• Dynamical Mean Field Approximation Applied to Quantum Field Theory
• Path integral Monte Carlo study of the interacting quantum double-well model: Quantum phase transition and phase diagram
• Effects of a dissipative coupling to the momentum of a particle in a double well potential