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Mostrando ítems 21-30 de 85
Artículo
Quasidiscrete microwave solitons in a split-ring-resonator-based left-handed coplanar waveguide
(2011)
We study the propagation of quasidiscrete microwave solitons in a nonlinear left-handed coplanar waveguide coupled with split-ring resonators. By considering the relevant transmission line analog, we derive a nonlinear ...
Artículo
SO(2)-induced breathing patterns in multi-component Bose-Einstein condensates
(American Physical Society, 2016)
In this work, we employ the SO(2)-rotations of a two-component, one-, two- and three-dimensional nonlinear Schr¨odinger system at and near the Manakov limit, to construct vector solitons and vortex structures. This way, ...
Artículo
Interplay between parity-time symmetry, supersymmetry, and nonlinearity: An analytically tractable case example
(American Physical Society, 2015)
In the present work, we combine the notion of parity-time (PT ) symmetry with that of supersymmetry (SUSY) for a prototypical case example with a complex potential that is related by SUSY to the so-called P¨oschl-Teller ...
Artículo
Floquet analysis of Kuznetsov-Ma breathers: A path towards spectral stability of rogue waves
(American Physical Society, 2017)
In the present work, we aim at taking a step towards the spectral stability analysis of Peregrine solitons, i.e., wave structures that are used to emulate extreme wave events. Given the space-time localized nature of ...
Artículo
Approximation of solitons in the discrete NLS equation
(World Scientific, 2008)
We study four diferent approximations for finding the profile of discrete solitons in the one-dimensional Discrete Nonlinear Schrödinger (DNLS) Equation. Three of them are discrete approximations (namely, a variational ...
Artículo
Dark-bright gap solitons in coupled-mode one-dimensional saturable waveguide arrays
(2011)
In the present work, we consider the dynamics of dark solitons as one mode of a defocusing photorefractive lattice coupled with bright solitons as a second mode of the lattice. Our investigation is motivated by an experiment ...
Artículo
PT -Symmetric dimer in a generalized model of coupled nonlinear oscillators
(Springer, 2015)
In the present work, we explore the case of a general PT -symmetric dimer in the context of two both linearly and nonlinearly coupled cubic oscillators. To obtain an analytical handle on the system, we first explore ...
Artículo
Easing COVID-19 lockdown measures while protecting the older restricts the deaths to the level of the full lockdown
(Nature Research, 2021-03)
Guided by a rigorous mathematical result, we have earlier introduced a numerical algorithm, which using as input the cumulative number of deaths caused by COVID-19, can estimate the effect of easing of the lockdown conditions. ...
Artículo
Existence of bound states of a polaron with a breather in soft potentials
(2006)
We consider polarons in models of coupled electronic and vibrational degrees of freedom, in the presence of a soft nonlinear substrate potential (Morse potential). In particular, we focus on a bound state of a polaron with ...
Artículo
Discrete peakons
(2005-08-01)
We demonstrate the possibility for explicit construction in a discrete Hamiltonian model of an exact solution of the form exp(−|n|), i.e., a discrete peakon. These discrete analogs of the well-known, continuum peakons of ...