Strong no-go theorem for Gaussian quantum bit commitment

Author(s)
Magnin, Loick; Magniez, Frederic; Leverrier, Anthony; Cerf, Nicolas J.
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Abstract
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.
Date issued
2010-01
URI
http://hdl.handle.net/1721.1/64469
Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Journal
Physical review A
Publisher
American Physical Society
Citation
Magnin, Loïck et al. “Strong no-go theorem for Gaussian quantum bit commitment.” Physical Review A 81.1 (2010) : n. pag. © 2010 The American Physical Society
Version: Final published version
ISSN
1050-2947
1094-1622
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