THE PROPAGATION AND INTERACTION DYNAMICS OF ELECTROMAGNETIC-FIELD CLOTS IN 2-LEVEL MEDIA

The propagation and interaction dynamics of electromagnetic field clots in nonlinear media is studied when the current generation effect may be described in the framework of the two-level quantum system (the Maxwell-Bloch equations). In the case of the absorbing two-level medium the collision properties of the steady halfwave solution [9] are analyzed. In the limit of large as well as small durations compared with the inverse transition frequency omega-0-1 the solutions noted have the soliton properties. In the case of the amplifying medium a new family of the nonstationary nonlinear solutions in the form of the wavepackets is found, their frequency shifting to the blue spectrum region with amplifying them. The conditions when the nonlinear optics of two-level medium may be transferred to the field electrodynamics of superconducting, including high-T(c), planar structures. On the basis of the analogy mentioned the notion is introduced and interpretation is given for the population inversion of the Josephson superconducting structure.