Year: 2007
Type: article
Abstract: We derive the form of the cross-Kerr interaction in a four-level atomic system in an N configuration. We use time-independent perturbation theory to calculate the eigenenergies and eigenstates of the Schr\"odinger equation for the system. The system is considered as a perturbation of a Raman-resonant three-level $\ensuremath{\lambda}$ scheme for which exact solutions are known. We show that within the strong control field limit the cross-Kerr interaction can arise between two weak probe fields. The strength of this nonlinear coupling is several orders of magnitude larger than that achievable using optical fibres.
Source: Physical Review A
Authors: Gary F. Sinclair, Natalia Korolkova
Institution: University of St Andrews
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2104770606