304 citations · 2.4k across the 32 of their papers we have counts for
4 papers · 1 filter
Discrete Breathers in One-Dimensional Diatomic Granular Crystals
N. Boechler, G. Theocharis, S. Job +3
We report the experimental observation of discrete breathers in a one-dimensional diatomic granular crystal composed of compressed elastic beads that interact via Hertzian contact.…
Multiple atomic dark solitons in cigar-shaped Bose-Einstein condensates
G. Theocharis, A. Weller, J. P. Ronzheimer +4
We consider the stability and dynamics of multiple dark solitons in cigar-shaped Bose-Einstein condensates (BECs). Our study is motivated by the fact that multiple matter-wave dark…
Localized Breathing Modes in Granular Crystals with Defects
G. Theocharis, M. Kavousanakis, P. G. Kevrekidis +3
We investigate nonlinear localized modes at light-mass impurities in a one-dimensional, strongly-compressed chain of beads under Hertzian contacts. Focusing on the case of one or t…
A two-dimensional paradigm for symmetry breaking: the nonlinear Schrodinger equation with a four-well potential
C. Wang, G. Theocharis, P. G. Kevrekidis +4
We study the existence and stability of localized states in the two-dimensional (2D) nonlinear Schrodinger (NLS)/Gross-Pitaevskii equation with a symmetric four-well potential. Usi…