Fidelity, entanglement, and information complementarity relation

Details Fidelity, entanglement, and information complementarity relation Fidelity, entanglement, and information complementarity relation

2006-09-05

arxiv.org/abs/quant-ph/0609026v2

Phys. Lett. A 363, 392 (2007)

Physics

Quantum Physics

5 pages, 3 figures

Scientific paper

10.1016/j.physleta.2006.11.067

We investigate the dynamics of information in isolated multi-qubit systems. It is shown that information is in not only local form but also nonlocal form. We apply a measure of local information based on fidelity, and demonstrate that nonlocal information can be directly related to some appropriate well defined entanglement measures. Under general unitary transformations, local and nonlocal information will exhibit unambiguous complementary behavior with the total information conserved.

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