M. Roy et Re. Amritkar, OBSERVATION OF STOCHASTIC COHERENCE IN COUPLED MAP LATTICES, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 55(3), 1997, pp. 2422-2425
Chaotic evolution of structures in a coupled map lattice driven by ide
ntical noise on each site is studied (a structure is a group of neighb
oring lattice sites for which values of the dynamical variable follow
a certain predefined pattern). The number of structures is seen to fol
low a power-law decay with length of the structure for a given noise s
trength. An interesting phenomenon, which we call stochastic coherence
, is reported in which a rise of bell-shaped type in abundance and lif
etimes of these structures is observed for a range of noise-strength v
alues.