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Phys. Rev. Lett. 77, 190–193 (1996)

Breathing Spots in a Reaction-Diffusion System

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D. Haim1, G. Li1, Q. Ouyang1, W. D. McCormick1, Harry L. Swinney1, A. Hagberg2, and E. Meron3
1Center for Nonlinear Dynamics and Department of Physics, The University of Texas at Austin, Austin, Texas 78712
2Center for Nonlinear Studies and T-7, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
3The Jacob Blaustein Institute for Desert Research and The Physics Department, Ben-Gurion University, Sede Boker Campus 84990, Israel

Received 18 March 1996; published in the issue dated 1 July 1996

A quasi-2-dimensional stationary spot in a disk-shaped chemical reactor is observed to bifurcate to an oscillating spot when a control parameter is increased beyond a critical value. Further increase of the control parameter leads to the collapse and disappearance of the spot. Analysis of a bistable activator-inhibitor model indicates that the observed behavior is a consequence of interaction of the front with the boundary near a parity breaking front bifurcation.

© 1996 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.190
DOI:
10.1103/PhysRevLett.77.190
PACS:
82.20.Mj, 47.54.+r, 82.40.Ck
 
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