Quantum cryptography using entangled photons in energy-time Bell states

Authors:W Tittel, J Brendel, H Zbinden, N Gisin
Journal:Physical Review Letters 84, 4737–4740 (2000)
DOI:@@doi@@
Abstract:We present a setup for quantum cryptography based on photon pairs in energy-time Bell states and show its feasibility in a laboratory experiment. Our scheme combines the advantages of using photon pairs instead of faint laser pulses and the possibility to preserve energy-rime entanglement over long distances. Moreover, using four-dimensional energy-time states, no fast random change of bases is required in our setup: Nature itself decides whether to measure in the energy or in the time base, thus rendering eavesdropper attacks based on “photon number splitting” less efficient.
File:qcbellstates.pdf

BibTeX Source

@ARTICLE{Tittel2000,
  author = {Tittel, W. and Brendel, J. and Zbinden, H. and Gisin, N.},
  title = {Quantum cryptography using entangled photons in energy-time Bell
	states},
  journal = {Physical Review Letters},
  year = {2000},
  volume = {84},
  pages = {4737--4740},
  number = {20},
  abstract = {We present a setup for quantum cryptography based on photon pairs
	in energy-time Bell states and show its feasibility in a laboratory
	experiment. Our scheme combines the advantages of using photon pairs
	instead of faint laser pulses and the possibility to preserve energy-rime
	entanglement over long distances. Moreover, using four-dimensional
	energy-time states, no fast random change of bases is required in
	our setup: Nature itself decides whether to measure in the energy
	or in the time base, thus rendering eavesdropper attacks based on
	"photon number splitting" less efficient. },
  owner = {cc},
  sn = {0031-9007},
  timestamp = {2010.08.20},
  ut = {WOS:000086997100056}
}