1211.0082 (Tie-Jun Wang et al.)

Complete analysis and generation of hyperentangled
Greenberger-Horne-Zeilinger state for photons using quantum-dot spins in
optical microcavities    [PDF]

Tie-Jun Wang, Si-Yu Song, Gui Lu Long

We propose a scheme for the complete differentiation of 64 three-photon hyperentangled GHZ states in both polarization and spatial-mode degrees of freedoms using the quantum-dot cavity system. The three-photon hyperentangled-GHZ-state-analysis scheme can also be used to generate 3-photon hyperentangled GHZ states. This proposed hyperentangled analysis and generation device can serve as crucial components of the high-capacity, long-distance quantum communication. We use quantum swapping as an example to show the application of this device in quantum communication with polarization and spatial-mode degrees of freedoms. Using numerical calculations, we show that the present scheme may be feasible in strong-coupling regimes with current technologies.

View original: http://arxiv.org/abs/1211.0082