Large cross-phase modulation between slow copropagating weak pulses in 87Rb.
We propose a scheme to generate double electromagnetically induced transparency and optimal cross-phase modulation for two slow, copropagating pulses with matched group velocities in a single species of atom, namely 87Rb. A single pump laser is employed and a homogeneous magnetic field is utilized to avoid cancellation effects through the nonlinear Zeeman effect. We suggest a feasible preparational procedure for the atomic initial state to achieve matched group velocities for both signal fields.
Wang
Zeng-Bin
ZB
Institute for Quantum Information Science, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
Marzlin
Karl-Peter
KP
Sanders
Barry C
BC