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.
Bibliographical noteCopyright 2006 by The American Physical Society. Reprinted from Physical review letters.
Wang, Z-B., Marzlin, K-P., & Sanders, B. C. (2006). Large cross-phase modulation between slow copropagating weak pulses in ⁸⁷Rb. Physical Review Letters, 97(6), 063901-1-063901-4. https://doi.org/10.1103/PhysRevLett.97.063901