# Quantum cryptography using entangled photons in energy-time Bell states

 Authors: W Tittel, J Brendel, H Zbinden, N Gisin Physical Review Letters 84, 4737–4740 (2000) @@doi@@ 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. 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}
}