Quantum direct communication with continuous variables

S. Pirandola, S. L. Braunstein, S. Mancini, S. Lloyd

Research output: Contribution to journalLetterpeer-review


We show how continuous-variable systems can allow the direct communication of messages with an acceptable degree of privacy. This is possible by combining a suitable phase-space encoding of the plain message with real-time checks of the quantum communication channel. The resulting protocol works properly when a small amount of noise affects the quantum channel. If this noise is non-tolerable, the protocol stops leaving a limited amount of information to a potential eavesdropper.

Original languageEnglish
Article number20013
Pages (from-to)20013
Number of pages6
JournalEurophysics Letters
Issue number2
Publication statusPublished - 1 Oct 2008


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