Entanglement Effect on Off-diagonal Geometric Phase
arXiv:quant-ph/0506247 · doi:10.1209/epl/i2005-10587-x
Abstract
The effect of entanglement on off-diagonal geometric phases is investigated in the paper. Two spin-1/2 particles in magnetic fields along the direction are taken as an example. Three parameters (the purity of state , the mixing angle and the relative phase ) are chosen to characterize the initial states. The nodal points at which the usual geometric phases disappear are calculated and illustrated as a function of the three parameters.
final version; appearing in Europhys. Lett. 74, 757(2006)
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