Berry phase for a spin 1/2 particle in a classical fluctuating field.

Phys Rev Lett

NEST-INFM & Scuola Normale Superiore, piazza dei Cavalieri 7, I-56126 Pisa, Italy.

Published: August 2003

The effect of fluctuations in the classical control parameters on the Berry phase of a spin 1/2 interacting with an adiabatically cyclically varying magnetic field is analyzed. It is explicitly shown that in the adiabatic limit dephasing is due to fluctuations of the dynamical phase.

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http://dx.doi.org/10.1103/PhysRevLett.91.090404DOI Listing

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