304 citations · 480 across the 5 of their papers we have counts for
13 papers
Defect Modes in One-Dimensional Granular Crystals
N. Boechler, G. Theocharis, Y. Man +2
We study the vibrational spectra of one-dimensional statically compressed granular crystals (arrays of elastic particles in contact) containing defects. We focus on the prototypica…
Discrete breathers at the interface between a diatomic and monoatomic granular chain
C. Hoogeboom, G. Theocharis, P. G. Kevrekidis
In the present work, we develop a systematic examination of the existence, stability and dynamical properties of a discrete breather at the interface between a diatomic and a monoa…
Experimental observation of oscillating and interacting matter wave dark solitons
A. Weller, J. P. Ronzheimer, C. Gross +5
We report on the generation, subsequent oscillation and interaction of a pair of matter wave dark solitons. These are created by releasing a Bose-Einstein condensate from a double…
Dark matter-wave solitons in the dimensionality crossover
G. Theocharis, P. G. Kevrekidis, M. K. Oberthaler +1
We consider the statics and dynamics of dark matter-wave solitons in the dimensionality crossover regime from 3D to 1D. There, using the nonpolynomial Schrödinger mean-field model,…
Soliton oscillations in collisionally inhomogeneous attractive Bose-Einstein condensates
P. Niarchou, G. Theocharis, P. G. Kevrekidis +2
We investigate bright matter-wave solitons in the presence of a spatially varying nonlinearity. It is demonstrated that a translation mode is excited due to the spatial inhomogenei…
Symmetry Breaking in Symmetric and Asymmetric Double-Well Potentials
G. Theocharis, P. G. Kevrekidis, D. J. Frantzeskakis +1
Motivated by recent experimental studies of matter-waves and optical beams in double well potentials, we study the solutions of the nonlinear Schrödinger equation in such a context…