Zobrazeno 1 - 10
of 656
pro vyhledávání: '"Frantzeskakis, D. J."'
We study nonlocal bright solitons subject to external spatially nonuniform potentials. If the potential is slowly varying on the soliton scale, we derive analytical soliton solutions behaving like Newtonian particles. If the potential has the form of
Externí odkaz:
http://arxiv.org/abs/2407.05797
We study the propagation of both low- and high-amplitude ring-shaped sound waves in a 2D square lattice of acoustic waveguides with Helmholtz resonators. We show that the inclusion of the Helmholtz resonators suppresses the inherent anisotropy of the
Externí odkaz:
http://arxiv.org/abs/2404.18966
Publikováno v:
Nonlinear Dynamics, March 2024, in production
The interaction between two co-propagating electromagnetic pulses in a magnetized plasma is considered, from first principles, relying on a fluid-Maxwell model. Two circularly polarized wavepackets by same group velocities are considered, characteriz
Externí odkaz:
http://arxiv.org/abs/2403.15005
Publikováno v:
Scientific Reports 14:2150 (2024)
An asymmetric pair of coupled nonlinear Schr{\"o}dinger (CNLS) equations has been derived through a multiscale perturbation method applied to a plasma fluid model, in which two wavepackets of distinct carrier wavenumbers and amplitudes are allowed to
Externí odkaz:
http://arxiv.org/abs/2403.14505
Publikováno v:
Math. Meth. Appl. Sci. (2024), 1-17
We study a spherical, self-gravitating fluid model, which finds applications in cosmic structure formation. We argue that since the system features nonlinearity and gravity-induced dispersion, the emergence of solitons becomes possible. We thus emplo
Externí odkaz:
http://arxiv.org/abs/2312.16577
Autor:
Katsimiga, G. C., Mistakidis, S. I., Malomed, B. A., Frantzeskakis, D. J., Carretero-González, R., Kevrekidis, P. G.
We explore the dynamics and interactions of multiple bright droplets and bubbles, as well as the interactions of kinks with droplets and with antikinks, in the extended one-dimensional Gross-Pitaevskii model including the Lee-Huang-Yang correction. E
Externí odkaz:
http://arxiv.org/abs/2306.07055
Autor:
Katsimiga, G. C., Mistakidis, S. I., Koutsokostas, G. N., Frantzeskakis, D. J., Carretero-Gonzalez, R., Kevrekidis, P. G.
Publikováno v:
Phys. Rev. A 107, 063308 (2023)
We unravel the existence and stability properties of dark soliton solutions as they extend from the regime of trapped quantum droplets towards the Thomas-Fermi limit in homonuclear symmetric Bose mixtures. Leveraging a phase-plane analysis, we identi
Externí odkaz:
http://arxiv.org/abs/2302.07767
Autor:
Mithun, T., Fritsch, A. R., Koutsokostas, G. N., Frantzeskakis, D. J., Spielman, I. B., Kevrekidis, P. G.
Publikováno v:
Phys. Rev. A 109, 023328 (2024)
We consider solitary wave excitations above the ground state of $F=1$ spin-orbit coupled Bose-Einstein condensates (SOBECs). The low energy properties of SOBECs in any of the three branches of the single particle dispersion relation can be described
Externí odkaz:
http://arxiv.org/abs/2212.12966
We study systematically the scattering of solitons on localized impurities in the discrete nonlinear Schr\"odinger (DNLS) equation with a saturable nonlinearity. We show that, apart from the generic scenario of the outcome of the scattering process,
Externí odkaz:
http://arxiv.org/abs/2210.09450
Autor:
Carretero-Gonzalez, R., Cisneros-Ake, L. A., Decker, R., Koutsokostas, G. N., Frantzeskakis, D. J., Kevrekidis, P. G., Ratliff, D. J.
The main focus of the present work is to study quasi-one-dimensional kink-antikink stripes embedded in the two-dimensional sine-Gordon equation. Using variational techniques, we reduce the interaction dynamics between a kink and an antikink stripe on
Externí odkaz:
http://arxiv.org/abs/2108.03121