Bifurcation Phenomenon in a Spin Relaxation

Abstract

Spin relaxation in a strong-coupling regime (with respect to the spin system) is investigated in detail based on the spin-boson model in a stochastic limit. We find a bifurcation phenomenon in temperature dependence of relaxation constants, which is never observed in the weak-coupling regime. We also discuss inequalities among the relaxation constants in our model and show the well-known relation 2Γ_T >= Γ_L, for example, for a wider parameter region than before.

REVTeX4, 5 pages, 5 EPS figures

References in corpus (2)

• Positive Quantum Brownian Evolution
• On the Stochastic Limit of Quantum Field Theory

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