Geometric stochastic resonance in a double cavity

Ghosh, Parthasarathi; Glavey, Russell; Marchesoni, F.; Savel’ev, Sergey; Nori, Franco

doi:10.1103/physreve.84.011109

Cited by 39 publications

(33 citation statements)

References 40 publications

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“…Previous works have attributed such improvements to the presence of periodic potentials [5][6][7] and to geometric resonance effects. 13 Here, we have shown that uncorrelated thermal noise and zero-mean harmonic disturbance are the minimum ingredients to form synchronization phenomena that lead to diffusion transport enhancement. From the Fokker-Planck equation (12), it is now clear that the mechanisms responsible of the transport enhancement can be drawn from the bilinear term sin (ωt)∂ z P(z, t).…”

Section: Numerical Results From the Fokker-planck Equationmentioning

confidence: 90%

Diffusion in one-dimensional channels with zero-mean time-periodic tilting forces

Muñoz-Gutiérrez

Álvarez‐Ramírez

Dagdug

et al. 2012

The Journal of Chemical Physics

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We investigate the motion of overdamped Brownian particles in a one-dimensional channel under a zero-mean time-periodic tilting force F(t). By introducing a simple harmonic signal, strong enhancement of diffusion is possible for relatively large values of the Peclet number. Direct numerical simulations over the corresponding Fokker-Planck equation show that the diffusion enhancement is induced by a type of nonlinear resonance effect involving the tilting force and the density gradient.

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Section: Numerical Results From the Fokker-planck Equationmentioning

confidence: 90%

Diffusion in one-dimensional channels with zero-mean time-periodic tilting forces

Muñoz-Gutiérrez

Álvarez‐Ramírez

Dagdug

et al. 2012

The Journal of Chemical Physics

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“…In the opposite case, we have growing excitation modes revealing the linear instability of the system (see also Refs. [67,68] for a discussion in self-gravitating BECs).…”

Section: B Focusing Nonlocal Nonlinearity: Jeans Instabilitymentioning

confidence: 99%

Massive phonons and gravitational dynamics in a photon-fluid model

Marino

2019

Phys. Rev. A

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We theoretically investigate the excitation dynamics in a photon-fluid with both local and nonlocal interactions. We show that the interplay between locality and an infinite-range nonlocality gives rise to a gapped Bogoliubov spectrum of elementary excitations which, at lower momenta, correspond to massive particles (phonons) with a relativistic energy-momentum relation. In this regime and in the presence of an inhomogeneous flow the density fluctuations are governed by the massive Klein-Gordon equation on the acoustic metric and thus propagate as massive scalar fields on a curved spacetime. We finally demonstrate that in the non-relativistic limit the phonon modes behave as self-gravitating quantum particles with an effective Schrödinger-Newton dynamics, although with a finite-range gravitational interaction and a non-zero cosmological constant. Our photon-fluid represents a viable alternative to BEC models for "emergent-gravity" scenarios and offers a promising setting for analogue simulations of quantum gravity phenomenology and semiclassical gravity.

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“…It is instructive to mention that space plasmas, particularly the near-Earth plasmas (i.e., ionospheric and auroral plasmas, plasmas in the magnetosphere) have high-energy tails and heat-flux shoulders, and it has been established that such plasmas are best modelled by a distribution rather than by a pure Maxwellian distribution. [35] Furthermore, in the recent past, experimental observations on solar wind plasmas have shown that such plasmas have a spectral index [36] ∼ 2.8, while in the Earth's magnetosphere it is typically in the range [37] 2 ≤ ≤ 8. We therefore, in this paper, have considered weakly dissipative DA solitons in the presence of superthermal particles, and this theoretical analysis has relevance to these environments.…”

Section: Effect Of Dust Concentrationmentioning

confidence: 99%

Weakly dissipative dust acoustic solitons in the presence of superthermal particles

Khan

Rahman

Hadi

et al. 2017

Contrib. Plasma Phys

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An investigation of the linear and non-linear properties of low-frequency electrostatic (dust acoustic) waves in a collisional dusty plasma with negative dust grains, Maxwellian electrons, and -distributed ions is carried out. Low dust-neutral collisions accounting for dissipation (wave damping effect) is considered. The linear properties of dust acoustic excitations are discussed for varying values of relevant plasma parameters. It is shown that large wavelengths (beyond a critical value) are overdamped. In the limit of low dust-neutral collision rate, we have derived a damped Korteweg de Vries (KdV) equation by using the reductive perturbation technique. Supplemented by vanishing boundary conditions, the time-varying solution of damped KdV equation leads to a weakly dissipative negative potential soliton. The soliton evolution with the damping parameter and other physical plasma parameters (superthermality, dust concentration, ion temperature) is delineated. KEYWORDS damped KdV equation, dust acoustic solitons, superthermal plasmas 1

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Geometric stochastic resonance in a double cavity

Cited by 39 publications

References 40 publications

Diffusion in one-dimensional channels with zero-mean time-periodic tilting forces

Diffusion in one-dimensional channels with zero-mean time-periodic tilting forces

Massive phonons and gravitational dynamics in a photon-fluid model

Weakly dissipative dust acoustic solitons in the presence of superthermal particles

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