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Hot Brownian carriers in the Langevin picture: Application to a simple model for the Gunn effect in GaAs
(2013-09-23)
We consider a charged Brownian gas under the influence of external, static and uniform electric and magnetic fields, immersed in a uniform bath temperature. We obtain the solution for the associated Langevin equation, and ...
Hot Brownian carriers in the Langevin picture: Application to a simple model for the Gunn effect in GaAs
(2013-09-23)
We consider a charged Brownian gas under the influence of external, static and uniform electric and magnetic fields, immersed in a uniform bath temperature. We obtain the solution for the associated Langevin equation, and ...
Revisiting random deposition with surface relaxation: Approaches from growth rules to Edwards-Wilkinson equation
(Iop Publishing, 2014-12)
We present several approaches for deriving the coarse-grained continuous Langevin equation (or Edwards-Wilkinson equation) from a random deposition with surface relaxation (RDSR) model. First we introduce a novel procedure ...
Conditions for the validity of the quantum Langevin equation
(AMER PHYSICAL SOCCOLLEGE PK, 2012)
From microscopic models, a Langevin equation can, in general, be derived only as an approximation. Two possible conditions to validate this approximation are studied. One is, for a linear Langevin equation, that the frequency ...
Langevin equations for the run-and-tumble of swimming bacteria
(Royal Society of Chemistry, 2018-05)
The run and tumble motions of a swimming bacterium are well characterized by two stochastic variables: the speed v(t) and the change of direction or deflection x(t) = cosφ(t), where φ(t) is the turning angle at time t. ...
Stochastic description for open quantum systems
(Elsevier Science, 2003-12)
A linear quantum Brownian motion model with a general spectral density function is considered. In the framework of the influence functional formalism, a Langevin equation can be introduced to describe the system's fully ...
Numerical simulation of Ginzburg-Landau-Langevin equations
(Sociedade Brasileira de Física, 2007-03-01)
This work is concerned with non-equilibrium phenomena, with focus on the numerical simulation of the relaxation of non-conserved order parameters described by stochastic kinetic equations known as Ginzburg-Landau-Langevin ...