Stationary and drifting localized structures near a multiple bifurcation point
Localized states embedded in a patterned background are found in numerical simulations of spontaneous pattern formation in a spin-1/2 atomic system with optical feedback. In the vicinity of a parameter region with bistability between two homogeneous states large amplitude peaks as well as dark holes exist as stable localized states on a hexagonal background. Moreover, resonant interaction between oscillatory and stationary inhomogeneous modes produces a nonstationary background which may force the localized states to drift.
Logvin
YA
Institute of Physics, Academy of Sciences, Skaryna avenue 70, 220072 Minsk, Belarus and Institut fur Angewandte Physik, Westfalische Wilhelms-Universitat Munster, Corrensstrasse 2/4, D-48149 Munster, Federal Republic of Germany.
Schapers
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Ackemann
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