Coherent State Distinguishability in Continuous Variable Quantum Cryptography

Details Coherent State Distinguishability in Continuous Variable Quantum Cryptography Coherent State Distinguishability in Continuous Variable Quantum Cryptography

2007-03-15

arxiv.org/abs/quant-ph/0703128v1

Physics

Quantum Physics

QCMC 2006 Proceedings Article

Scientific paper

We use the probability of error as a measure of distinguishability between
two pure and two mixed symmetric coherent states in the context of continuous
variable quantum cryptography. We show that the two mixed symmetric coherent
states (in which the various components have the same real part) never give an
eavesdropper more information than two pure coherent states.

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