title: Generalized synchrony of coupled stochastic processes with multiplicative noise.
abstract: We study the effect of multiplicative noise in dynamical flows arising from the coupling of stochastic processes with intrinsic noise. Situations wherein such systems arise naturally are in chemical or biological oscillators that are coupled to each other in a drive-response configuration. Above a coupling threshold we find that there is a strong correlation between the drive and the response: This is a stochastic analog of the phenomenon of generalised synchronization. Since the dynamical fluctuations are large when there is intrinsic noise, it is necessary to employ measures that are sensitive to correlations between the variables of drive and the response, the permutation entropy, or the mutual information in order to detect the transition to generalized synchrony in such systems.
authors.affiliation: Department of Physics, Aligarh Muslim University, Aligarh 202 002, India.
authors.forename: Haider Hasan
authors.initials: HH
authors.lastname: Jafri
authors.affiliation: School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi 110 067, India.
authors.forename: R K Brojen
authors.initials: RK
authors.lastname: Singh
authors.affiliation: School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi 110 067, India.|School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110 067, India.
authors.forename: Ramakrishna
authors.initials: R
authors.lastname: Ramaswamy