title: Detection of weak signals through nonlinear relaxation times for a Brownian particle in an electromagnetic field.
abstract: The detection of weak signals through nonlinear relaxation times for a Brownian particle in an electromagnetic field is studied in the dynamical relaxation of the unstable state, characterized by a two-dimensional bistable potential. The detection process depends on a dimensionless quantity referred to as the receiver output, calculated as a function of the nonlinear relaxation time and being a characteristic time scale of our system. The latter characterizes the complete dynamical relaxation of the Brownian particle as it relaxes from the initial unstable state of the bistable potential to its corresponding steady state. The one-dimensional problem is also studied to complement the description.
authors.affiliation: Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, CP 09340 Distrito Federal, Mexico. ines@xanum.uam.mx
authors.forename: J I
authors.initials: JI
authors.lastname: Jiménez-Aquino
authors.forename: M
authors.initials: M
authors.lastname: Romero-Bastida
mesh_terms: D000465:Algorithms; D001703:Biophysics / Q000379:methods*; D004058:Diffusion; D004574:Electromagnetic Fields; D015233:Models, Statistical; D009068:Movement; D016011:Normal Distribution; D013269:Stochastic Processes; D013696:Temperature; D013997:Time Factors