Berry phase in open quantum systems: a quantum Langevin equation approach

Details Berry phase in open quantum systems: a quantum Langevin equation approach Berry phase in open quantum systems: a quantum Langevin equation approach

2004-10-22

arxiv.org/abs/quant-ph/0410183v2

Eur. Phys. J. D 41, 179-183 (2007)

Physics

Quantum Physics

6 pages, no figures. Published version

Scientific paper

10.1140/epjd/e2006-00186-y

The evolution of a two level system with a slowly varying Hamiltonian, modeled as s spin 1/2 in a slowly varying magnetic field, and interacting with a quantum environment, modeled as a bath of harmonic oscillators is analyzed using a quantum Langevin approach. This allows to easily obtain the dissipation time and the correction to the Berry phase in the case of an adiabatic cyclic evolution.

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