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

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

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 dissi...

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Veröffentlicht in:arXiv.org 2007-01
Hauptverfasser: De Chiara, Gabriele, Lozinski, Artur, Palma, G Massimo
Format: Artikel
Sprache:eng
Schlagworte:
Evolution
Harmonic oscillators
Quantum mechanics
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Zusammenfassung: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0410183