Complete Greenberger-Horne-Zeilinger state analyzer using hyper-entanglement

摘要

In this paper, we design a scheme where a polarization Greenberger-Horne-Zeilinger (GHZ) state can be completely and deterministically distinguished by adopting linear momentum degree of freedom as the ancillary qubits or change of roles between the momentum and polarization degrees of freedom. Two ways for distinguishing threephoton GHZ state can be achieved in just one quantum circuit.