Coexisting Pulses in a Model for Binary-Mixture Convection

Details Coexisting Pulses in a Model for Binary-Mixture Convection Coexisting Pulses in a Model for Binary-Mixture Convection

1995-05-19

arxiv.org/abs/patt-sol/9505003v2

Phys. Rev. Lett. 75 (1995) 4035-4038

Nonlinear Sciences

Pattern Formation and Solitons

5 pages revtex with 4 postscript figures (everything uuencoded)

Scientific paper

10.1103/PhysRevLett.75.4035

We address the striking coexistence of localized waves (`pulses') of different lengths which was observed in recent experiments and full numerical simulations of binary-mixture convection. Using a set of extended Ginzburg-Landau equations, we show that this multiplicity finds a natural explanation in terms of the competition of two distinct, physical localization mechanisms; one arises from dispersion and the other from a concentration mode. This competition is absent in the standard Ginzburg-Landau equation. It may also be relevant in other waves coupled to a large-scale field.

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