Chinese Journal of Quantum Electronics

Continuous variable quantum dialogue protocol based on squeezed state

Sheng Zhang

Published Jan 1, 2011• 0 citations

Abstract

In quantum cryptography,it is commonly established that quantum key distribution and quantum secure direct,communication work in a single direction,namely one direction communication schemes. However,quantum dialog protocol can enable two legal users exchange messages simultaneously,namely two direction communication.Most existed proposals of quantum dialog protocol are based on discrete variables, which are much more difficult to implement with today's technology,thus they are less practical than its counterpart.Based on squeezed states,a new quantum dialog scheme is proposed,information-theoretical analysis is then followed and it shows that our scheme is not only secure,but also has larger channel capacity than that of its counterpart.

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