Getting Something Out of Nothing

Hoi-Kwong Lo

Getting Something Out of Nothing

Quantum Physics 2007-05-23 v1

Authors: Hoi-Kwong Lo

Abstract

We study quantum key distribution with standard weak coherent states and show, rather counter-intuitively, that the detection events originated from vacua can contribute to secure key generation rate, over and above the best prior art result. Our proof is based on a communication complexity/quantum memory argument.

Keywords

quantum key distribution random number generation quantum cryptography

Cite

@article{arxiv.quant-ph/0503004,
  title  = {Getting Something Out of Nothing},
  author = {Hoi-Kwong Lo},
  journal= {arXiv preprint arXiv:quant-ph/0503004},
  year   = {2007}
}

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4 pages

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