Optical nonlinearities sensitive to individual photons may be extremely useful as elements in quantum logic circuits for photonic qubits. A much cited example is the work of Turchette et al. [Phys. Rev. Lett. 75, 4710 (1995)], in which a phase shift of about 10 degrees was reported. To improve this result, we propose a single sided cavity geometry with minimal cavity losses. It should then be possible to achieve a nonlinear phase shift of 180 degrees.
@article{arxiv.quant-ph/0209151,
title = {Realization of a resonant non-linear phase flip in cavity quantum electrodynamics},
author = {Holger F. Hofmann and Kunihiro Kojima and Shigeki Takeuchi and Keiji Sasaki},
journal= {arXiv preprint arXiv:quant-ph/0209151},
year = {2007}
}
Comments
4 pages, contribution to the proceedings of QIT7, held November 2002 in Tokyo