| Issue |
EPL
Volume 81, Number 3, February 2008
|
|
|---|---|---|
| Article Number | 30006 | |
| Number of page(s) | 6 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/81/30006 | |
| Published online | 31 December 2007 | |
Differential susceptibility to noise of mixed Turing and Hopf modes in a photosensitive chemical medium
1
Abteilung Physikalische Chemie, Fritz-Haber-Institut der Max-Plank-Gesellschaft - 14195 Berlin, Germany
2
Department of Systems Biology, Harvard Medical School - 02115 Boston, MA, USA
3
Departament de Química Física, Universitat de Barcelona - 08028 Barcelona, Spain
Received:
5
October
2007
Accepted:
27
November
2007
We report on experiments with the photosensitive chlorine dioxide-iodine-malonic acid reaction (CDIMA) when forced with a random (spatiotemporally) distributed illumination. Acting on a mixed mode consisting of oscillating spots, close enough to the Hopf and Turing codimension-two bifurcation, we observe attenuation of oscillations while the spatial pattern is preserved. Numerical simulations confirm and extend these results. All together these observations point out to a larger vulnerability of the Hopf with respect to the Turing mode when facing noise of intermediate intensity and small correlation parameters.
PACS: 05.40.Ca – Noise / 82.40.Ck – Pattern formation in reactions with diffusion, flow and heat transfer / 47.54.-r – Pattern selection; pattern formation
© EPLA, 2008
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