摘要
We propose new methods to construct universal Greenberger-Horne-Zeilinger(GHZ)-state analyzers without destroying the qubits by using two-qubit parity gates. The idea can be applied to any physical systems where the two-qubit parity gate can be realized.We also investigate the feasibility of nondestructively distinguishing the GHZ-basis states for photonic qubits with such an idea.The nondestructive GHZ-state analyzers can act as generators of GHZ entangled states and are expected to find useful applications for resource-saving quantum information processing.
We propose new methods to construct universal Greenberger-Horne-Zeilinger （GHZ）-state analyzers without destroying the qubits by using two-qubit parity gates. The idea can be applied to any physical systems where the two-qubit parity gate can be realized. We also investigate the feasibility of nondestructively distinguishing the GHZ-basis states for photonic qubits with such an idea. The nondestructive GHZ-state analyzers can act as generators of GHZ entangled states and are expected to find useful applications for resource-saving quantum information processing.
基金
supported by the National Basic Research Program of China(Grant No.2013CB921804)
the National Natural Science Foundation of China(Grant Nos.11004050,11075050 and 11375060)
the Key Project of Chinese Ministry of Education(Grant No.211119)
the China Postdoctoral Science Foundation funded project(Grant No.2013T60769)
the construct program of the key discipline in Hunan province
