Dynamics of one-site fermionic model in the presence of precessing magnetic field

A.C. Aguiar Pinto, R. Bruno and M.T. Thomaz

Physica A: Statistical Mechanics and its Applications, 1997, vol. 241, issue 3, 535-548

Abstract: The one site self-interacting fermionic model is considered in the presence of an external magnetic field precessing with constant angular velocity around a fixed axis. We get the exact density operator for the identical particle system as well as its one-particle properties, for general initial conditions. Due to the non-trivial topology of the external magnetic field, the one-particle states get Berry's phases. We show that the geometric phases contribute to the frequency of the one-particle population state in the adiabatic regime.

Keywords: Matrix operator; Fermionic system; Berry's phases (search for similar items in EconPapers)
Date: 1997
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:241:y:1997:i:3:p:535-548

DOI: 10.1016/S0378-4371(97)00172-6

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