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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Deterministic distribution of four-photon Dicke state over an arbitrary collective-noise channel with cross-Kerr
Mei-Yu Wang1, Feng-Li Yan1, Ting Gao2
1College of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050024, China.
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.
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