Single-photon entanglement concentration for long-distance quantum communication (pp0272-0281)
          Yu-Bo Sheng, Fu-Guo Deng, and Hong-Yu Zhou
          doi: https://doi.org/10.26421/QIC10.3-4-7
Abstracts: We present a single-photon entanglement concentration protocol for long-distance quantum communication with quantum nondemolition detector. It is the first concentration protocol for single-photon entangled states and it dose not require the two parties of quantum 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-photon detectors, which makes this protocol more feasible in current experiments. Moreover, it can be iterated to get a higher efficiency and yield. All these advantages maybe make this protocol have more practical applications in long-distance quantum communication and quantum internet.
Key words: single-photon entanglement, entanglement purification, long-distance quantum communication, quantum nondemolition detector, cross-Kerr nonlinearity