Measurable nonlocal effect of bipartite system during a local cyclic evolution of its subsystem

Details Measurable nonlocal effect of bipartite system during a local cyclic evolution of its subsystem Measurable nonlocal effect of bipartite system during a local cyclic evolution of its subsystem

2004-03-15

arxiv.org/abs/quant-ph/0403110v2

Europhys. Lett. 75(1), 1-7(2006)

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

10.1209/epl/i2005-10598-7

In this letter, a nonlocal effect for a bipartite system which is induced by a local cyclic evolution of one of its subsystem is suggested. This effect vanishes when the system is at a disentangled pure state but can be observed for some disentangled mixed states. As a paradigm, we study the effect for the system of two qubits in detail. It is interesting that the effect is directly related to the degree of entanglement for pure state of qubit pairs. Furthermore, we suggest a Bell-type experiment to measure this nonlocal effect for qubit pairs.

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