Stop and go control of light in hot atomic gases
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abstract
We consider a new way to trap light pulses inside a gaseous medium by using additional electromagnetic fields. The drive field controls the transparency and the dispersion of the medium. Applied auxiliary fields provide additional control on the propagation of the probe pulse via the dragging effect resulting from the population redistribution between hyperfine levels of different velocity groups. The density matrix calculation is performed to prove that these effects are experimentally feasible.
