The Transition Between Quantum Coherence and Incoherence

Abstract

We show that a transformed Caldeira-Leggett Hamltonian has two distinct families of fixed points, rather than a single unique fixed point as often conjectured based on its connection to the anisotropic Kondo model. The two families are distinguished by a sharp qualitative difference in their quantum coherence properties and we argue that this distinction is best understood as the result of a transition in the model between degeneracy and non-degeneracy in the spectral function of the ``spin-flip'' operator.

some typos corrected and a reference added

References in corpus (1)

• Crossover from coherent to incoherent dynamics in damped quantum systems

Cited by in corpus (8)

• Dynamical simulation of current fluctuations in a dissipative two-state system
• Scaling and universality in the anisotropic Kondo model and the dissipative two-state system
• Exploring the Kondo model in and out of equilibrium with alkaline-earth atoms
• Thermodynamics of the dissipative two-state system: a Bethe Ansatz study
• Noncrossing Approximation for the Anisotropic Kondo Model: Charge Fluctuations in a Quantum Box
• Effect of bath temperature on the decoherence of quantum dissipative systems
• Coherence correlations in the dissipative two-state system
• Decay of correlations in the dissipative two-state system