%0 Journal Article
%T Weak-Light, Zero to -¦ÐLossless Kerr-Phase Gate in Quantum-well System via Tunneling Interference Effect
%A Y. L. Shi
%A Y. C. Huang
%A J. X. Wu
%A C. J. Zhu
%A J. P. Xu
%A Y. P. Yang
%J Physics
%D 2015
%I arXiv
%R 10.1103/PhysRevA.91.063838
%X We examine a Kerr phase gate in a semiconductor quantum well structure based on the tunnelling interference effect. We show that there exist a specific signal field detuning, at which the absorption/amplification of the probe field will be eliminated with the increase of the tunnelling interference. Simultaneously, the probe field will acquire a -\pi phase shift at the exit of the medium. We demonstrate with numerical simulations that a complete 180^\circ phase rotation for the probe field at the exit of the medium is achieved, which may result in many applications in information science and telecommunication.
%U http://arxiv.org/abs/1504.08048v1