Experimentally testable geometric phase of sequences of Everett's relative quantum statesE. Sjöqvist
Department of Quantum Chemistry, Uppsala University - Box 518, SE-751 20 Uppsala, Sweden, EU
received 9 March 2009; accepted in final form 15 April 2009; published May 2009
published online 21 May 2009
Everett's concept of relative state is used to introduce a geometric phase that depends nontrivially on entanglement in a pure quantum state. We show that this phase can be measured in multiparticle interferometry. A correlation-dependent generalization of the relative state geometric phase to mixed quantum states is outlined.
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.).
© EPLA 2009