Shrimali, Manish Dev ; Poria, Swarup ; Sinha, Sudeshna (2010) Under what kind of parametric fluctuations is spatiotemporal regularity the most robust? Pramana - Journal of Physics, 74 (6). pp. 895-906. ISSN 0304-4289
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Official URL: http://www.ias.ac.in/pramana/v74/p895/fulltext.pdf
Related URL: http://dx.doi.org/10.1007/s12043-010-0082-z
Abstract
It was observed that the spatiotemporal chaos in lattices of coupled chaotic maps was suppressed to a spatiotemporal fixed point when some fraction of the regular coupling connections were replaced by random links. Here we investigate the effects of different kinds of parametric fluctuations on the robustness of this spatiotemporal fixed point regime. In particular we study the spatiotemporal dynamics of the network with noisy interaction parameters, namely fluctuating fraction of random links and fluctuating coupling strengths. We consider three types of fluctuations: (i) noisy in time, but homogeneous in space; (ii) noisy in space, but fixed in time; (iii) noisy in both space and time. We find that the effect of different kinds of parameteric noise on the dynamics is quite distinct: quenched spatial fluctuations are the most detrimental to spatiotemporal regularity; spatiotemporal fluctuations yield phenomena similar to that observed when parameters are held constant at the mean-value; and interestingly, spatiotemporal regularity is most robust under spatially uniform temporal fluctuations, which in fact yields a larger fixed point range than that obtained under constant mean-value parameters.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | Coupled Map Lattice; Parametric Fluctuations; Networks; Spatiotemporal Dynamics; Synchronization |
ID Code: | 60945 |
Deposited On: | 12 Sep 2011 09:48 |
Last Modified: | 18 May 2016 10:52 |
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