The quantum cryptography and the unambiguous measurement of quantum nonorthogonal states

Details The quantum cryptography and the unambiguous measurement of quantum nonorthogonal states The quantum cryptography and the unambiguous measurement of quantum nonorthogonal states

1997-02-19

arxiv.org/abs/quant-ph/9702037v2

Physics

Quantum Physics

withdrawal

Scientific paper

We discuss the unambiguous measurement of quantum nonorthogonal states in
connection with the quantum cryptography. We show that checking a ratio of null
one to signal is essential in detecting a certain kind of eavesdropping in the
case of two nonorthogonal states quantum cryptography. We prove that it is not
needed in the case of the four states quantum cryptography.

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