Stochastic resonance and nonlinear response in a dissipative quantum two-state system

Details Stochastic resonance and nonlinear response in a dissipative quantum two-state system Stochastic resonance and nonlinear response in a dissipative quantum two-state system

1997-04-29

arxiv.org/abs/cond-mat/9704243v1

Physics

Condensed Matter

Statistical Mechanics

PRB April 1997, figures available on request

Scientific paper

10.1103/PhysRevB.55.9318

We study the dynamics of a dissipative two-level, system driven by a monochromatic ac field, starting from the usual spin-boson Hamiltonian. The quantum Langevin equations for the spin variables are obtained. The amplitude of the coherent oscillations in the average position of the particle is studied in the high temperature limit. The system exhibits quantum stochastic resonance in qualitative agreement with earlier numerical results.

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