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pro vyhledávání: '"Deza, Roberto R."'
The deterministic KPZ equation has been recently formulated as a gradient flow, in a nonequilibrium potential (NEP) \[\Phi[h(\mathbf{x},t)]=\int\mathrm{d}\mathbf{x}\left[\frac{\nu}{2}(\nabla h)^2-\frac{\lambda}{2}\int_{h_0(\mathbf{x},0)}^{h(\mathbf{x
Externí odkaz:
http://arxiv.org/abs/1511.03727
Publikováno v:
Papers in Physics 5, 050010 (2013)
Recently, a variational approach has been introduced for the paradigmatic Kardar--Parisi--Zhang (KPZ) equation. Here we review that approach, together with the functional Taylor expansion that the KPZ nonequilibrium potential (NEP) admits. Such expan
Externí odkaz:
http://arxiv.org/abs/1401.6425
Publikováno v:
Eur. Phys. J. Special Topics 143, 135-141 (2007)
Two identical 1D autocatalytic systems with Gray--Scott kinetics--driven towards convectively unstable regimes and submitted to independent spatiotemporal Gaussian white noises--are coupled unidirectionally, but otherwise linearly. Numerical simulati
Externí odkaz:
http://arxiv.org/abs/0704.1175
Publikováno v:
AIP Conference Proceedings -- February 8, 2007 -- Volume 887, pp. 89-95
We investigate a ring of $N$ FitzHugh--Nagumo elements coupled in \emph{phase-repulsive} fashion and submitted to a (subthreshold) common oscillatory signal and independent Gaussian white noises. This system can be regarded as a reduced version of th
Externí odkaz:
http://arxiv.org/abs/0704.1171
Publikováno v:
AIP Conference Proceedings -- May 23, 2007 -- Volume 913, pp. 62-67
The local, uncorrelated multiplicative noises driving a second-order, purely noise-induced, ordering phase transition (NIPT) were assumed to be Gaussian and white in the model of [Phys. Rev. Lett. \textbf{73}, 3395 (1994)]. The potential scientific a
Externí odkaz:
http://arxiv.org/abs/0704.1155
Aspects of stochastic resonance in reaction-diffusion systems: The nonequilibrium-potential approach
Autor:
Wio, Horacio S., Deza, Roberto R.
We analyze several aspects of the phenomenon of stochastic resonance in reaction-diffusion systems, exploiting the nonequilibrium potential's framework. The generalization of this formalism (sketched in the appendix) to extended systems is first carr
Externí odkaz:
http://arxiv.org/abs/0704.1148
Publikováno v:
Nuovo Cim. B115 (2000) 239-244
Within the framework of stochastic inflationary cosmology we derive steady-state distributions P_c(V) of domains in comoving coordinates, under the assumption of slow-rolling and for two specific choices of the coarse-grained inflaton potential $V(\P
Externí odkaz:
http://arxiv.org/abs/gr-qc/9911100
Publikováno v:
In Physica A: Statistical Mechanics and its Applications 15 February 2017 468:289-298
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Autor:
Mangioni, Sergio E., Deza, Roberto R.
Publikováno v:
In Physica A: Statistical Mechanics and its Applications 1 September 2012 391(17):4191-4205