Bell's inequalities detect efficient entanglement

Details Bell's inequalities detect efficient entanglement Bell's inequalities detect efficient entanglement

2003-10-28

arxiv.org/abs/quant-ph/0310166v1

Int. J. Quant. Inf. 2, 23 (2004)

Physics

Quantum Physics

9 pages, for the Proceedings of EQIS'03 (Kyoto, Sept. 2003)

Scientific paper

We review the status of Bell's inequalities in quantum information, stressing mainly the links with quantum key distribution and distillation of entanglement. We also prove that for all the eavesdropping attacks using one qubit, and for a family of attacks of two qubits, acting on half of a maximally entangled state of two qubits, the violation of a Bell inequality implies the possibility of an efficient secret-key extraction.

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