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Optica Publishing Group
  • CLEO/Europe and EQEC 2009 Conference Digest
  • (Optica Publishing Group, 2009),
  • paper EA2_5

Nonclassical Interferences with separate fibre sources of intrinsically time bandwidth limited photon pairs

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Abstract

Single photons are at the heart of optical quantum technologies such as quantum cryptography, quantum computing and quantum metrology. To achieve high visibility two-photon interferences, the photons need to be in a pure state which usually is achieved by narrow band filtering. This reduces the overall efficiency of detection (μ) and hence limits current experiments to a photon number of 4-6. To achieve significant count rates for higher order multi-photon experiments (such as a cascaded CNOT or Cluster states) an improvement in μ to over 20% is essential.

© 2009 IEEE

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