Controllable Entanglement of Lights in a Five-Level System
arXiv:quant-ph/0511027 · doi:10.1016/j.physleta.2006.01.015
Abstract
We analyze the nonlinear optical response of a five-level system under a novel configuration of electro-magnetically induced transparency. We show that a giant Kerr nonlinearity with a relatively large cross-phase modulation coefficient that occurs in such system may be used to produce an efficient photon-photon entanglement. We demonstrate that such photon-photon entanglement is practically controllable and hence facilitates promising applications in quantum information and computation.
13 pages, 4 figures, 1 column. We have added a section in which the distortion of pulses due to the dispersion is considered