title: Deterministic distribution of four-photon Dicke state over an arbitrary collective-noise channel with cross-Kerr nonlinearity.
abstract: We present two deterministic quantum entanglement distribution protocols for a four-photon Dicke polarization entangled state resorting to the frequency and spatial degrees of freedom, which are immune to an arbitrary collective-noise channel. Both of the protocols adopt the X homodyne measurement based on the cross-Kerr nonlinearity to complete the task of the single-photon detection with nearly unit probability in principle. After the four receivers share the photons, they add some local unitary operations to obtain a standard four-photon Dicke polarization entangled state.
authors.affiliation: College of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050024, China.
authors.forename: Mei-Yu
authors.initials: MY
authors.lastname: Wang
authors.affiliation: College of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050024, China.
authors.forename: Feng-Li
authors.initials: FL
authors.lastname: Yan
authors.affiliation: College of Mathematics and Information Science, Hebei Normal University, Shijiazhuang 050024, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Gao