Phase ordering induced by defects in chaotic bistable media |
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Authors: | C Echeverria K Tucci M G Cosenza |
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Institution: | (1) Laboratorio de Física Aplicada Computacional, Universidad Nacional Experimental del Táchira, 2130 San Cristóbal, Venezuela;(2) SUMA-CeSiMo, Universidad de Los Andes, Mérida, 5251 Mérida, Venezuela;(3) Centro de Física Fundamental, Universidad de Los Andes, Mérida, Mérida, 5251, Venezuela |
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Abstract: | The phase ordering dynamics of coupled chaotic bistable maps on lattices with defects
is investigated. The statistical properties of the system are characterized
by means of the average normalized size of spatial domains of equivalent spin variables
that define the phases. It is found that spatial defects can induce the formation of domains
in bistable spatiotemporal systems. The minimum distance
between defects acts as parameter for a transition
from a homogeneous state to a heterogeneous regime where two phases coexist
The critical exponent of this transition also exhibits
a transition when the coupling is increased,
indicating the presence of a new class of domain where both phases
coexist forming a chessboard pattern. |
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Keywords: | |
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