Rabi switch of condensate wavefunctions in a multicomponent Bose gas (2008)
Nistazakis, H. E., Rapti, Z., Frantzeskakis, D. J., Kevrekidis, P. G., Sodano, P., Trombettoni, A.
Using a time-dependent linear (Rabi) coupling between the components of a weakly interacting multicomponent Bose-Einstein condensate (BEC), we propose a protocol for transferring the wavefunction of...
Rabi switch of condensate wavefunctions in a multicomponent Bose gas (2008)
Nistazakis, H.E., Rapti, Z., Frantzeskakis, D.J., Kevrekidis, P.G., Sodano, P., Trombettoni, A.
Polarized States and Domain Walls in Spinor Bose-Einstein Condensates (2007)
Nistazakis, H. E., Frantzeskakis, D. J., Kevrekidis, P. G., Malomed, B. A., Carretero-Gonzalez, R., Bishop, A. R.
We study spin-polarized states and their stability in anti-ferromagnetic states of spinor (F=1) quasi-one-dimensional Bose-Einstein condensates. Using analytical approximations and numerical methods,...
Bright-Dark Soliton Complexes in Spinor Bose-Einstein Condensates (2007)
Nistazakis, H. E., Frantzeskakis, D. J., Kevrekidis, P. G., Malomed, B. A., Carretero-Gonzalez, R.
We present bright-dark vector solitons in quasi-one-dimensional spinor (F=1) Bose-Einstein condensates. Using a multiscale expansion technique, we reduce the corresponding nonintegrable system of...
Fractional-period excitations in continuum periodic systems (2006)
Nistazakis, H. E., Porter, Mason A., Kevrekidis, P. G., Frantzeskakis, D. J., Nicolin, A., Chin, J. K.
We investigate the generation of fractional-period states in continuum periodic systems. As an example, we consider a Bose-Einstein condensate confined in an optical-lattice potential. We show that...
Fractional-Period Excitations in Continuum Periodic Systems (2005)
Nistazakis, H. E., Porter, Mason A., Kevrekidis, P. G., Frantzeskakis, D. J., Nicolin, A., Chin, J. K.
We investigate the generation of fractional-period states in continuum periodic systems. As an example, we consider a Bose-Einstein condensate confined in an optical-lattice potential. We show that...
Static and rotating domain-wall crosses in Bose-Einstein condensates (2004)
Malomed, Boris A., Nistazakis, H. E., Frantzeskakis, D. J., Kevrekidis, P. G.
For a Bose-Einstein condensate (BEC) in a two-dimensional (2D) trap, we introduce cross patterns, which are generated by intersection of two domain walls (DWs) separating immiscible species, with...
Deconinck, B., Kevrekidis, P. G., Nistazakis, H. E., Frantzeskakis, D. J.
In this paper, an exact unitary transformation is examined that allows for the construction of solutions of coupled nonlinear Schr{\"o}dinger equations with additional linear field coupling, from...
Domain Walls of Single-Component Bose-Einstein Condensates in External Potentials (2004)
Kevrekidis, P. G., Malomed, B. A., Frantzeskakis, D. J., Bishop, A. R., Nistazakis, H. E., Carretero-González, R.
We demonstrate the possibility of creating domain walls described by a single component Gross-Pitaevskii equation with attractive interaction, in the presence of an optical-lattice potential. While...
Time-Dependent Trapping of Solitons in Bose-Einstein Condensates (2002)
Nistazakis, H. E., Frantzeskakis, D. J., Brouzakis, N., Diakonos, F. K., Schmelcher, P., Schmiedmayer, J.
We study the influence of a time-dependent potential on the motion of solitons in a quasi one-dimensional Bose-Einstein condensate by solving the corresponding Gross-Pitaevskii equation. For a...
Scattering of a solitary pulse on a local defect or breather (2002)
Kevrekidis, Panayotis G., Malomed, Boris A., Nistazakis, H. E., Frantzeskakis, Dimitri J., Saxena, A., Bishop, A. R.
A model is introduced to describe guided propagation of a linear or nonlinear pulse which encounters a localized nonlinear defect, that may be either static or breather-like one (the model with the...
Multi-channel pulse dynamics in a stabilized Ginzburg-Landau system (2001)
Nistazakis, H. E., Frantzeskakis, D. J., Atai, J., Malomed, B. A., Efremidis, N., Hizanidis, K.
We study the stability and interactions of chirped solitary pulses in a system of nonlinearly coupled cubic Ginzburg-Landau (CGL) equations with a group-velocity mismatch between them, where each CGL...