Abstract
We examine a lossless Kerr-phase gate in a semiconductor quantum-well system via the tunneling interference effect for weak fields. We show that there exists a magic detuning for the signal field, at which the absorption or amplification for the probe field can be eliminated by increasing the tunneling interference effect. Simultaneously, the probe field will acquire a phase shift at the exit of the medium. We demonstrate with numerical simulations that a lossless Kerr-phase gate is achieved, which may result in many applications in information science and telecommunication.
- Received 29 April 2015
DOI:https://doi.org/10.1103/PhysRevA.91.063838
©2015 American Physical Society