Effects of entanglement on off-diagonal geometric phasesH. T. Cui, L. C. Wang and X. X. Yi
Department of Physics, Dalian University of Technology - Dalian 116024, PRC
received 13 July 2005; accepted in final form 10 April 2006
published online 5 May 2006
The effect of entanglement on off-diagonal geometric phases is investigated in the paper. Two spin-(1/2) particles in magnetic fields along the y direction are taken as an example. Three parameters (the purity of state r, 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.
03.65.Vf - Phases: geometric; dynamic or topological.
03.65.Ud - Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.).
© EDP Sciences 2006