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8 papers · 2 filters
Efficient polarization entanglement concentration for electrons with charge detection
Yu-Bo Sheng, Fu-Guo Deng, Hong-Yu Zhou
We present an entanglement concentration protocol for electrons based on their spins and their charges. The combination of an electronic polarizing beam splitter and a charge detec…
Multipartite entanglement purification with quantum nondemolition detectors
Yu-Bo Sheng, Fu-Guo Deng, Bao-Kui Zhao +2
We present a scheme for multipartite entanglement purification of quantum systems in a Greenberger-Horne-Zeilinger state with quantum nondemolition detectors (QNDs). This scheme do…
Efficient quantum key distribution over a collective noise channel
Xi-Han Li, Fu-Guo Deng, Hong-Yu Zhou
We present two efficient quantum key distribution schemes over two different collective-noise channels. The accepted hypothesis of collective noise is that photons travel inside a…
Nonlocal entanglement concentration scheme for partially entangled multipartite systems with nonlinear optics
Yu-Bo Sheng, Fu-Guo Deng, Hong-Yu Zhou
We present a nonlocal entanglement concentration scheme for reconstructing some maximally entangled multipartite states from partially entangled ones by exploiting cross-Kerr nonli…
Efficient polarization entanglement purification based on parametric down-conversion sources with cross-Kerr nonlinearity
Yu-Bo Sheng, Fu-Guo Deng, Hong-Yu Zhou
We present a way for entanglement purification based on two parametric down-conversion (PDC) sources with cross-Kerr nonlinearities. It is comprised of two processes. The first one…
Helicity Entanglement of Moving Bodies
Shuxin Shao, Song He, Hongbao Zhang
We investigate the Lorentz transformation of the reduced helicity density matrix for a pair of massive spin 1/2 particles. The corresponding Wootters concurrence shows no invariant…