Noise-induced transitions

摘要: In this paper I will deal with the effect of external random perturbations, “noise”, on chemical systems and other open nonlinear systems. As a concrete example let us consider CSTR. This is an system as such subject to constraints, namely concentrations species in feed streams, flow rate, stirring temperature, incident light intensity case photochemical reaction. These constraints characterize state environment will, general, fluctuate more or less strongly. Such environmental fluctuations are particularly important for natural systems; here always present their amplitude not necessarily small laboratory latter experimenter course try minimize though it impossible eliminate noise completely. Clearly, ubiquitous systems, but fact by itself would hardly warrant systematic study effects fluctuations. The question whether than mere nuisance we have live with. Is there any hope finding interesting physics? intuitive, wrong, answer be negative: averages out rapid only trace certain fuzziness system. Of course, if becomes unstable, initiate departure from unstable state. Then dynamics take over evolves new stable