1D stability analysis of filtering and controlling the solitons in Bose-Einstein condensates

S. De Nicola*, R. Fedele, D. Jovanovic, B. Malomed, M. A. Man'Ko, V. I. Man'Ko, P. K. Shukla

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present one-dimensional (1D) stability analysis of a recently proposed method to filter and control localized states of the Bose-Einstein condensate (BEC), based on novel trapping techniques that allow one to conceive methods to select a particular BEC shape by controlling and manipulating the external potential well in the three-dimensional (3D) Gross-Pitaevskii equation (GPE). Within the framework of this method, under suitable conditions, the GPE can be exactly decomposed into a pair of coupled equations: a transverse two-dimensional (2D) linear Schrödinger equation and a one-dimensional (1D) longitudinal nonlinear Schrödinger equation (NLSE) with, in a general case, a time-dependent nonlinear coupling coefficient. We review the general idea how to filter and control localized solutions of the GPE. Then, the 1D longitudinal NLSE is numerically solved with suitable non-ideal controlling potentials that differ from the ideal one so as to introduce relatively small errors in the designed spatial profile. It is shown that a BEC with an asymmetric initial position in the confining potential exhibits breather-like oscillations in the longitudinal direction but, nevertheless, the BEC state remains confined within the potential well for a long time. In particular, while the condensate remains essentially stable, preserving its longitudinal soliton-like shape, only a small part is lost into "radiation".

Original languageEnglish
Pages (from-to)113-119
Number of pages7
JournalEuropean Physical Journal B
Volume54
Issue number1
DOIs
StatePublished - Nov 2006

Fingerprint

Dive into the research topics of '1D stability analysis of filtering and controlling the solitons in Bose-Einstein condensates'. Together they form a unique fingerprint.

Cite this