TY - JOUR

T1 - Cross-Kerr interaction in a four-level atomic system

AU - Sinclair, Gary F.

AU - Korolkova, Natalia

PY - 2007/9

Y1 - 2007/9

N2 - 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 Schrodinger equation for the system. The system is considered as a perturbation of a Raman-resonant three-level 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.

AB - 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 Schrodinger equation for the system. The system is considered as a perturbation of a Raman-resonant three-level 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.

UR - http://www.scopus.com/inward/record.url?scp=34548751173&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.76.033803

DO - 10.1103/PhysRevA.76.033803

M3 - Article

SN - 1050-2947

VL - 76

SP - 033803

JO - Physical Review. A, Atomic, molecular, and optical physics

JF - Physical Review. A, Atomic, molecular, and optical physics

ER -