Enhancement of spatiotemporal regularity in an optimal window of random coupling

Poria, Swarup ; Shrimali, Manish Dev ; Sinha, Sudeshna (2008) Enhancement of spatiotemporal regularity in an optimal window of random coupling Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 78 (3). 035201_1-035201_4. ISSN 1539-3755

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Official URL: http://pre.aps.org/abstract/PRE/v78/i3/e035201

Related URL: http://dx.doi.org/10.1103/PhysRevE.78.035201

Abstract

We investigate the spatiotemporal dynamics of a lattice of coupled chaotic maps whose coupling connections are dynamically rewired to random sites with probability p; namely, at any instance of time, with probability p a regular link is switched to a random one. In a range of weak coupling, where spatiotemporal chaos exists for regular lattices (i.e., for p=0), we find that p > 0 yields synchronized periodic orbits. Further, we observe that this regularity occurs over a window of p values, beyond which the basin of attraction of the synchronized cycle shrinks to zero. Thus we have evidence of an optimal range of randomness in coupling connections, where spatiotemporal regularity is efficiently obtained. This is in contrast to the commonly observed monotonic increase of synchronization with increasing p, as seen, for instance, in the strong-coupling regime of the very same system.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:60935
Deposited On:12 Sep 2011 09:44
Last Modified:18 May 2016 10:52

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