Abstract

The propagation of longitudinal-transverse acoustic pulses in a system of resonance paramagnetic impurities is theoretically investigated. It is shown that, when the transverse component of a pulse is dominant and propagates along an external magnetic field, a regime of acoustic self-induced transparency is implemented. In the opposite limit, a new soliton regime is implemented, accompanied by a decrease of the propagation rate similar to what takes place for self-induced transparency. In this case, however, the populations of the quantum Zeeman sublevels remain virtually unchanged, and the transverse component of the pulse experiences phase modulation. A close parallel is drawn with the corresponding optical effects of laser-pulse propagation. © 2004 Optical Society of America

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