title: Experimental verification of fault tolerant quantum key distribution protocol.
abstract: We have investigated fault tolerant quantum key distribution experimentally, using four polarization encoding two-qubit states generated by spontaneous parametric down conversion. Collective noises on polarization and phase were simulated by passing the states through a half wave plate and a quarter wave pate. Error rate was calculated by measuring the two-qubit states in three basis. Our results show that the protocol is tolerant under collective random unitary noise.
authors.forename: Yun-Kun
authors.initials: YK
authors.lastname: Jiang
authors.forename: Xiang-Bin
authors.initials: XB
authors.lastname: Wang
authors.forename: Bao-Sen
authors.initials: BS
authors.lastname: Shi
authors.forename: Akihisa
authors.initials: A
authors.lastname: Tomita