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We study numerically the integrable turbulence in the framework of the focusing one-dimensional nonlinear Schrodinger equation using a new method -- the "growing of turbulence". We add to the equation a weak controlled pumping term and…

斑图形成与孤子 · 物理学 2020-09-29 D. S. Agafontsev , V. E. Zakharov

We examine statistical properties of integrable turbulence in the defocusing and focusing regimes of one-dimensional small-dispersion nonlinear Schrodinger equation (1D-NLSE). Specifically, we study the 1D-NLSE evolution of partially…

可精确求解与可积系统 · 物理学 2019-09-25 Giacomo Roberti , Gennady El , Stephane Randoux , Pierre Suret

We use the spectral kinetic theory of soliton gas to investigate the likelihood of extreme events in integrable turbulence described by the one-dimensional focusing nonlinear Schr\"odinger equation (fNLSE). This is done by invoking a…

斑图形成与孤子 · 物理学 2024-05-21 T. Congy , G. A. El , G. Roberti , A. Tovbis , S. Randoux , P. Suret

In the framework of the focusing Nonlinear Schrodinger (NLS) equation we study numerically the nonlinear stage of the modulation instability (MI) of the condensate. As expected, the development of the MI leads to formation of "integrable…

可精确求解与可积系统 · 物理学 2015-09-15 D. S. Agafontsev , V. E. Zakharov

We use the spectral theory of soliton gas for the one-dimensional focusing nonlinear Schr\"odinger equation (fNLSE) to describe the statistically stationary and spatially homogeneous integrable turbulence emerging at large times from the…

斑图形成与孤子 · 物理学 2024-11-12 D. S. Agafontsev , T. Congy , G. A. El , S. Randoux , G. Roberti , P. Suret

We investigate theoretically the fundamental phenomenon of the spontaneous, noise-induced modulational instability (MI) of a plane wave. The long-term statistical properties of the noise-induced MI have been previously observed in…

可精确求解与可积系统 · 物理学 2019-12-11 Andrey Gelash , Dmitry Agafontsev , Vladimir Zakharov , Gennady El , Stephane Randoux , Pierre Suret

We study numerically the nonlinear stage of modulational instability (MI) of cnoidal waves, in the framework of the focusing one-dimensional Nonlinear Schrodinger (NLS) equation. Cnoidal waves are the exact periodic solutions of the NLS…

斑图形成与孤子 · 物理学 2022-12-09 D. S. Agafontsev , V. E. Zakharov

We develop a general analytical framework for determining the probability distribution of random nonlinear wave fields governed by the focusing nonlinear Schr\"odinger equation (fNLSE) in regimes where typical realizations are dominated by…

斑图形成与孤子 · 物理学 2026-05-08 T. Congy , G. A. El

We examine the general question of statistical changes experienced by ensembles of nonlinear random waves propagating in systems ruled by integrable equations. In our study that enters within the framework of integrable turbulence, we…

光学 · 物理学 2016-08-24 S. Randoux , P. Walczak , M. Onorato , P. Suret

We study numerically the integrable turbulence developing from strongly nonlinear partially coherent waves, in the framework of the focusing one-dimensional nonlinear Schrodinger equation. We find that shortly after the beginning of motion…

斑图形成与孤子 · 物理学 2021-03-24 D. S. Agafontsev , S. Randoux , P. Suret

We study numerically the nonintegrable dynamics of coherent, solitonic, nonlinear waves, in a spatially nonlocal nonlinear Schrodinger equation relevant to realistic modelling of optical systems: the Schrodinger-Helmholtz equation. We…

斑图形成与孤子 · 物理学 2025-05-15 Clement Colleaux , Jonathan Skipp , Sergey Nazarenko , Jason Laurie

In many plasma systems, introducing a small background shear flow is enough to stabilize the system linearly. The nonlinear dynamics are much less sensitive to sheared flows than the average linear growthrates, and very small amplitude…

等离子体物理 · 物理学 2018-01-17 Chris C. T. Pringle , Ben F. McMillan , Bogdan Teaca

We use recently introduced notion of stochastic soliton lattice for quantitative description of soliton turbulence. We consider the stochastic soliton lattice on a special band-gap scaling of the spectral surface of genus $N$ so that the…

可精确求解与可积系统 · 物理学 2009-10-31 Gennady A. El , Alexander L. Krylov , Stanislav A. Molchanov , Stephanos Venakides

We study experimentally, in a large-scale basin, the propagation of unidirectional deep water gravity waves stochastically modulated in phase. We observe the emergence of nonlinear localized structures that evolve on a stochastic wave…

斑图形成与孤子 · 物理学 2018-10-19 A Cazaubiel , G. Michel , S Lepot , B Semin , S Aumaître , M Berhanu , Félicien Bonnefoy , Eric Falcon

The concept of Nonlinear dispersion relation (NDR) is used in various fields of Physics (nonlinear optics, hydrodynamics, hydroelasticity, mechanics, quantum optics, plasma physics,...) to characterize fundamental phenomena induced by…

I consider the hydrodynamic stability of imploding gases as a model for inertial confinement fusion capsules, sonoluminescent bubbles and the gravitational collapse of astrophysical gases. For oblate modes under a homologous flow, a…

流体动力学 · 物理学 2023-07-19 Bryan M. Johnson

We analyze a set of bidirectional wave experiments in a linear wave flume of which some are conducive to integrable turbulence. In all experiments the wavemaker forcing is sinusoidal and the wave motion is recorded by seven high-resolution…

流体动力学 · 物理学 2022-10-11 Ivan Redor , Hervé Michallet , Nicolas Mordant , Eric Barthélemy

We report optical fiber experiments allowing to investigate integrable turbulence in the focusing regime of the one dimensional nonlinear Schr\"odinger equation (1D-NLSE). Our experiments are very similar in their principle to water tank…

斑图形成与孤子 · 物理学 2015-04-16 Pierre Walczak , Stéphane Randoux , Pierre Suret

We analyze a one-dimensional two-scalar fields reaction advection diffusion model for the globally subcritical transition to turbulence. In this model, the homogeneous turbulent state is disconnected from the laminar one and disappears in a…

流体动力学 · 物理学 2024-07-09 Pavan V. Kashyap , Juan F. Marìn , Yohann Duguet , Olivier Dauchot

We consider the dynamics of internal envelope solitons in a two-layer rotating fluid with a linearly varying bottom. It is shown that the most probable frequency of a carrier wave which constitutes the solitary wave is the frequency where…

流体动力学 · 物理学 2019-03-25 Yury Stepanyants
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