Quantum bit commitment under Gaussian constraints

Aikaterini Mandilara, Nicolas J. Cerf

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Quantum bit commitment has long been known to be impossible. Nevertheless, just as in the classical case, imposing certain constraints on the power of the parties may enable the construction of asymptotically secure protocols. Here, we introduce a quantum bit commitment protocol and prove that it is asymptotically secure if cheating is restricted to Gaussian operations. This protocol exploits continuous-variable quantum optical carriers, for which such a Gaussian constraint is experimentally relevant as the high optical nonlinearity needed to effect deterministic non-Gaussian cheating is inaccessible.

Original languageEnglish
Article number062310
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number6
Publication statusPublished - Jun 12 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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