Single-photon entanglement concentration for long-distance quantum communication

  • Authors:

  • Yu-Bo Sheng;Fu-Guo Deng;Hong-Yu Zhou

  • Affiliations:

  • Key Laboratory of Beam Technology and Material Modification of Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing, China;Department of Physics, Beijing Normal University, Beijing, China;Key Laboratory of Beam Technology and Material Modification of Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing, China and Beijing Radiation ...

  • Venue:
  • Quantum Information & Computation
  • Year:
  • 2010

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Abstract

We present a single-photon entanglement concentration protocol for long-distance quan-tum communication with quantum nondemolition detector. It is the first concentrationprotocol for single-photon entangled states and it dose not require the two parties ofquantum communication to know the accurate information about the coefficient α and β of the less entangled states. Also, it does not resort to sophisticated single-photondetectors, which makes this protocol more feasible in current experiments. Moreover, itcan be iterated to get a higher efficiency and yield. All these advantages maybe makethis protocol have more practical applications in long-distance quantum communicationand quantum internet.