Far-off resonance conditional phase-shifter using the ac-Stark shift
arXiv:0901.0742 · doi:10.1016/j.optcom.2009.05.031
Abstract
We propose a simple technique that achieves a conditional phase shift of pi radians between two weak lasers with energies at the 1000-photon level. The key idea is to set up a V-system with two far-off resonant lasers by coupling the ground state to two excited electronic states. The lasers interact through the ac Stark shift of the ground state and thereby acquire a large conditional phase shift.
4 pages, 3 figures