Complete hyperentangled-Bell-state analysis for photon systems assisted by quantum-dot spins in optical microcavities.

@article{Ren2012CompleteHA,
  title={Complete hyperentangled-Bell-state analysis for photon systems assisted by quantum-dot spins in optical microcavities.},
  author={Bao‐Cang Ren and Hai-Rui Wei and Ming Hua and Tao E Li and Fu-Guo Deng},
  journal={Optics express},
  year={2012},
  volume={20 22},
  pages={
          24664-77
        }
}
Bell-state analysis (BSA) is essential in quantum communication, but it is impossible to distinguish unambiguously the four Bell states in the polarization degree of freedom (DOF) of two-photon systems with only linear optical elements, except for the case in which the BSA is assisted with hyperentangled states, the simultaneous entanglement in more than one DOF. Here, we propose a scheme to distinguish completely the 16 hyperentangled Bell states in both the polarization and the spatial-mode… Expand

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