Browsing by Author "Koukouloyannis V."
Now showing items 1-5 of 5
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Bright breathers in nonlinear left-handed metamaterial lattices
Koukouloyannis V.; Kevrekidis P.G.; Veldes G.P.; Frantzeskakis D.J.; Dimarzio D.; Lan X.; Radisic V.... more authors ... less authors ( Institute of Physics Publishing , 2018 , Article)In the present work, we examine a prototypical model for the formation of bright breathers in nonlinear left-handed metamaterial lattices. Utilizing the paradigm of nonlinear transmission lines, we build a relevant lattice ... -
Collapse dynamics for the discrete nonlinear Schrödinger equation with gain and loss
Fotopoulos, G.; Karachalios, N.I.; Koukouloyannis, V.; Vetas, K. ( Elsevier B.V. , 2019 , Article)We discuss the finite-time collapse, also referred as blow-up, of the solutions of a discrete nonlinear Schrödinger (DNLS) equation incorporating linear and nonlinear gain and loss. Such an extended DNLS system appears in ... -
Dynamical transitions between equilibria in a dissipative Klein-Gordon lattice
Frantzeskakis D.J.; Karachalios N.I.; Kevrekidis P.G.; Koukouloyannis V.; Vetas K. ( Academic Press Inc. , 2019 , Article)We consider the energy landscape of a dissipative Klein–Gordon lattice with a on-site potential. Our analysis is based on suitable energy arguments, combined with a discrete version of the Łojasiewicz inequality, in order ... -
On the nonexistence of degenerate phase-shift discrete solitons in a dNLS nonlocal lattice
Penati T.; Sansottera M.; Paleari S.; Koukouloyannis V.; Kevrekidis P.G. ( Elsevier B.V. , 2018 , Article)We consider a one-dimensional discrete nonlinear Schrdinger (dNLS) model featuring interactions beyond nearest neighbors. We are interested in the existence (or nonexistence) of phase-shift discrete solitons, which correspond ... -
On the nonexistence of degenerate phase-shift multibreathers in Klein–Gordon models with interactions beyond nearest neighbors
Penati T.; Koukouloyannis V.; Sansottera M.; Kevrekidis P.G.; Paleari S. ( Elsevier B.V. , 2019 , Article)In this work, we study the existence of, low amplitude, phase-shift multibreathers for small values of the linear coupling in Klein–Gordon chains with interactions beyond the classical nearest-neighbor (NN) ones. In the ...