Generation and complete analysis of the hyperentangled Bell state for photons assisted by quantum-dot spins in optical microcavities

摘要

We propose a scheme for the production of hyperentangled photon pairs as well as for the completendifferentiation of 16 hyperentangled Bell states in both polarization and spatial-mode degrees of freedomnusing the quantum-dot cavity systems. This hyperentangled-Bell-state photon generation and the completenhyperentangled-Bell-state-analysis device can serve as crucial components of the high-capacity, long-distancenquantum communication.We use the hyperentanglement quantum repeater as an example to show the applicationnof this device. When the hyperentanglement quantum repeater operation is complete, two parties that are far fromneach other in quantum communication can share two Bell-state spin pairs simultaneously. By using numericalncalculations we prove that the present scheme can both work in the weak- and strong-coupling regimes withncurrent technology.