Conditional quantum phase gate using distant atoms and linear optics
Xu‐Bo Zou, Wolfgang M. Mathis · Physical Review A · 2005
A scheme is proposed to implement a conditional quantum phase gate between atoms trapped in spatially separated cavities. Instead of direct interaction between atoms, quantum interference of polarized photons decayed from the optical cavities is used to realize the desired quantum operation between two distant atoms. The scheme requires a twofold coincidence detection, and is insensitive to the imperfection of the photon detectors.