Complete Greenberger–Horne–Zeilinger state analyzer using hyper-entanglement
Jiaming Wang, Meng-Zheng Zhu, Liu Ye · Modern Physics Letters B · 2016
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 three-photon GHZ state can be achieved in just one quantum circuit.