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Phys. Rev. Lett. 77, 2475–2478 (1996)

Chaotic Localized States near the Onset of Electroconvection

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Michael Dennin1,2, Guenter Ahlers1, and David S. Cannell1
1Department of Physics and Center for Nonlinear Science, University of California, Santa Barbara, California 93106
2Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095

Received 4 March 1996; published in the issue dated 16 September 1996

We report on chaotic localized traveling-wave states (pulses) near the onset of electroconvection in a nematic liquid crystal. They coexist with the conduction state, are long lived, appear and die at irregular locations and times, have unique small widths, and vary irregularly in length. In this system there are only four linearly unstable modes. Thus it should be possible to reproduce the dynamics of the pulses by four coupled complex Ginzburg-Landau equations once their coefficients are derived from the equations of motion (the weak-electrolyte model).

© 1996 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.2475
DOI:
10.1103/PhysRevLett.77.2475
PACS:
47.52.+j, 47.20.-k, 47.54.+r