Light propagation through closed-loop atomic media beyond the multiphoton resonance condition

Details Light propagation through closed-loop atomic media beyond the multiphoton resonance condition Light propagation through closed-loop atomic media beyond the multiphoton resonance condition

2006-09-27

arxiv.org/abs/quant-ph/0609206v1

Phys. Rev. A. 74, 063827 (2006)

Physics

Quantum Physics

10 pages, 8 figures

Scientific paper

10.1103/PhysRevA.74.063827

The light propagation of a probe field pulse in a four-level double-lambda type system driven by laser fields that form a closed interaction loop is studied. Due to the finite frequency width of the probe pulse, a time-independent analysis relying on the multiphoton resonance assumption is insufficient. Thus we apply a Floquet decomposition of the equations of motion to solve the time-dependent problem beyond the multiphoton resonance condition. We find that the various Floquet components can be interpreted in terms of different scattering processes, and that the medium response oscillating in phase with the probe field in general is not phase-dependent. The phase dependence arises from a scattering of the coupling fields into the probe field mode at a frequency which in general differs from the probe field frequency. We thus conclude that in particular for short pulses with a large frequency width, inducing a closed loop interaction contour may not be advantageous, since otherwise the phase-dependent medium response may lead to a distortion of the pulse shape. Finally, using our time-dependent analysis, we demonstrate that both the closed-loop and the non-closed loop configuration allow for sub- and superluminal light propagation with small absorption or even gain. Further, we identify one of the coupling field Rabi frequencies as a control parameter that allows to conveniently switch between sub- and superluminal light propagation.

Affiliated with

Also associated with

No associations

Rating

Light propagation through closed-loop atomic media beyond the multiphoton resonance condition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Light propagation through closed-loop atomic media beyond the multiphoton resonance condition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light propagation through closed-loop atomic media beyond the multiphoton resonance condition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-167651