Strong no-go theorem for Gaussian quantum bit commitment
Journal Article
·
· Physical Review. A
- Quantum Information and Communication (QuIC), Ecole Polytechnique, Universite Libre de Bruxelles, B-1050 Brussels (Belgium)
- Laboratoire de Recherche en Informatique (LRI), Univ Paris-Sud, CNRS, F-91405 Orsay (France)
- Institut Telecom / Telecom ParisTech, CNRS LTCI, 46 rue Barrault, F-75634 Paris Cedex 13 (France)
Unconditionally secure bit commitment is forbidden by quantum mechanics. We extend this no-go theorem to continuous-variable protocols where both players are restricted to use Gaussian states and operations, which is a reasonable assumption in current-state optical implementations. Our Gaussian no-go theorem also provides a natural counter-example to a conjecture that quantum mechanics can be rederived from the assumption that key distribution is allowed while bit commitment is forbidden in Nature.
- OSTI ID:
- 21408139
- Journal Information:
- Physical Review. A, Vol. 81, Issue 1; Other Information: DOI: 10.1103/PhysRevA.81.010302; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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