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Listar por autor "Karachalios, Nikolaos I."
Mostrando ítems 1-10 de 10
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Artículo
A lower bound for the power of periodic solutions of the defocusing discrete nonlinear Schrodinger equation
Karachalios, Nikolaos I.; Cuevas-Maraver, Jesús; Eilbeck, J. Chris (2008) -
Artículo
Breathers for the discrete nonlinear Schrödinger equation with nonlinear hopping
Karachalios, Nikolaos I.; Sánchez-Rey, Bernardo; Kevrekidis, Panayotis G.; Cuevas-Maraver, Jesús (2013)We discuss the existence of breathers and lower bounds on their power, in nonlinear Schrödinger lattices with nonlinear ...
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Ponencia
Discrete solitons in optical BEC lattices. Effects of n-body interactions
Cuevas-Maraver, Jesús; Kevrekidis, Panayotis G.; Karachalios, Nikolaos I.; Melvin, Thomas R.O.; Champneys, A. R.; Eilbeck, J. Chris (2006)In this poster we show some recent results concerning discrete solitons in strong optical lattices, which can be described ...
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Artículo
Energy thresholds for the existence of breather solutions and traveling waves on lattices
Cuevas-Maraver, Jesús; Karachalios, Nikolaos I.; Palmero Acebedo, Faustino (2010)We discuss the existence of breathers and of energy thresholds for their formation in DNLS lattices with linear and ...
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Artículo
Escape dynamics in the discrete repulsive φ4 model
Achilleos, V. A.; Álvarez Chillida, María Azucena; Cuevas-Maraver, Jesús; Frantzeskakis, Dimitri J.; Karachalios, Nikolaos I.; Kevrekidis, Panayotis G.; Sánchez-Rey, Bernardo (2013)We study deterministic escape dynamics of the discrete Klein-Gordon model with a repulsive quartic on-site potential. Using ...
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Artículo
Floquet analysis of Kuznetsov-Ma breathers: A path towards spectral stability of rogue waves
Cuevas-Maraver, Jesús; Kevrekidis, Panayotis G.; Frantzeskakis, Dimitri J.; Karachalios, Nikolaos I.; Haragus, Mariana; James, Guillaume (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 ...
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Artículo
Kuznetsov–Ma breather-like solutions in the Salerno model
Sullivan, J.; Charalampidis, E. G.; Cuevas-Maraver, Jesús; Kevrekidis, Panayotis G.; Karachalios, Nikolaos I. (Springer Verlag, 2020-07)The Salerno model is a discrete variant of the celebrated nonlinear Schr¨odinger (NLS) equation interpolating between the ...
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Artículo
Lower and upper estimates on the excitation threshold for breathers in DNLS lattices
Cuevas-Maraver, Jesús; Karachalios, Nikolaos I.; Palmero Acebedo, Faustino (2009)We propose analytical lower and upper estimates on the excitation threshold for breathers (in the form of spatially localized ...
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Capítulo de Libro
Supersonic Kinks in Coulomb lattices
Archilla, Juan F. R.; Kosevich, Yuriy A.; Jiménez, Noé; Sánchez-Morcillo, Víctor J.; García Raffi, Luis M. (Springer International Publishing, 2014)There exist in nature examples of lattices of elements for which the interaction is repulsive, the elements are kept in ...
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Artículo
Thresholds for breather solutions of the discrete nonlinear Schrödinger equation with saturable and power nonlinearity
Cuevas-Maraver, Jesús; Eilbeck, J. Chris; Karachalios, Nikolaos I. (2008)We consider the question of existence of periodic solutions (called breather solutions or discrete solitons) for the ...