Secure Communication Using Mesoscopic Coherent States

Geraldo A. Barbosa*, Eric Corndorf, Prem Kumar, Horace P. Yuen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

76 Scopus citations


We demonstrate theoretically and experimentally that secure communication using intermediate-energy (mesoscopic) coherent states is possible. Our scheme is different from previous quantum cryptographic schemes in that a short secret key is explicitly used and in which quantum noise hides both the bit and the key. This encryption scheme allows optical amplification. New avenues are open to secure communications at high speeds in fiber-optic or free-space channels.

Original languageEnglish (US)
Pages (from-to)4
Number of pages1
JournalPhysical review letters
Issue number22
StatePublished - 2003

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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