Quantum Smoluchowski equation for a spin bath

Sinha, Sudarson Sekhar ; Ghosh, Arnab ; Ray, Deb Shankar (2011) Quantum Smoluchowski equation for a spin bath Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 84 (3). 031118_1-031118_7. ISSN 1539-3755

Full text not available from this repository.

Official URL: http://pre.aps.org/abstract/PRE/v84/i3/e031118

Related URL: http://dx.doi.org/10.1103/PhysRevE.84.031118


We derive the quantum mechanical description of overdamped Brownian motion of a particle in a spin bath of two-level atoms. The resulting Smoluchowski equation is used to calculate the rate of escape of the particle from a metastable state. At 0 K the decay rate is finite. We show that while quantization enhances the decay rate, higher temperatures induce thermal saturation, resulting in effective a reduction of the system-bath coupling. The role of coherence is examined.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:69931
Deposited On:12 Nov 2011 11:41
Last Modified:12 Nov 2011 11:41

Repository Staff Only: item control page