We propose a construction scheme of a two-photon polarization controlled arbitrary phase gate based on weak cross-phase modulation. Assisted with weak cross-phase modulation and homodyne measurement on the coherent states, the individual photons are entangled together. Employing the combination of optical elements and classical feed-forward techniques, the target photon can have a conditionally shifted arbitrary phase with efficiency approaching nearly unity. With a large-amplitude coherent state, the high success probability of the controlled arbitrary phase gate can be guaranteed.
© 2013 Optical Society of America
Original Manuscript: October 8, 2012
Revised Manuscript: December 4, 2012
Manuscript Accepted: January 9, 2013
Published: February 15, 2013
Xiao-Ming Xiu, Li Dong, Hong-Zhi Shen, Ya-Jun Gao, and X. X. Yi, "Construction scheme of a two-photon polarization controlled arbitrary phase gate mediated by weak cross-phase modulation," J. Opt. Soc. Am. B 30, 589-597 (2013)