Efficient Polarization Entanglement Distribution for W State Assisted by Frequency Degree of Freedom
Yan Li, Xiao Chen, Zhi Zeng, Xihan Li · Communications in Theoretical Physics · 2013
We present an efficient faithful polarization entanglement distribution protocol for W state over an arbitrary noise channel, which use the frequency degree of freedom to carry the entanglement during the transmission. We describe the transmission of three-photon W state as an example, and then generalize this scheme to n-qubit W state situation. The remote parties can obtain maximally entangled W states on the polarization of photons, and the success probability is 100% in principle. As there was few entanglement purification for W state, our scheme is an efficient and practical method to share W state entanglement between distant parties, which will be useful in quantum communication. We also show that our scheme can be used to distribute arbitrary multi-particle entangled state.