Coupled cavities for enhancing the cross-phase modulation in electromagnetically induced transparency
Abstract
We propose an optical double-cavity resonator whose response to a signal is similar to that of an Electromagnetically Induced Transparency (EIT) medium. A combination of such a device with a four-level EIT medium can serve for achieving large cross-Kerr modulation of a probe field by a signal field. This would offer the possibility of building a quantum logic gate based on photonic qubits. We discuss the technical requirements that are necessary for realizing a probe-photon phase shift of Pi caused by a single-photon signal. The main difficulty is the requirement of an ultra-low reflectivity beamsplitter and to operate a sufficiently dense cool EIT medium in a cavity.
Keywords
Cite
@article{arxiv.quant-ph/0012073,
title = {Coupled cavities for enhancing the cross-phase modulation in electromagnetically induced transparency},
author = {T. Opatrny and D. -G. Welsch},
journal= {arXiv preprint arXiv:quant-ph/0012073},
year = {2009}
}
Comments
10 pages, 5 figures, REVTeX, to appear in Phys. Rev. A (v2 - minor changes in discussion of experimental conditions)