Intermediate states in quantum cryptography and Bell inequalities

Details Intermediate states in quantum cryptography and Bell inequalities Intermediate states in quantum cryptography and Bell inequalities

2002-08-06

arxiv.org/abs/quant-ph/0208031v1

Physics

Quantum Physics

19 pages, 1 figure included

Scientific paper

10.1103/PhysRevA.67.062310

Intermediate states are known from intercept/resend eavesdropping in the BB84 quantum cryptographic protocol. But they also play fundamental roles in the optimal eavesdropping strategy on BB84 and in the CHSH inequality. We generalize the intermediate states to arbitrary dimension and consider intercept/resend eavesdropping, optimal eavesdropping on the generalized BB84 protocol and present a generalized CHSH inequality for two entangled quNits based on these states.

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