We solve the Gross-Pitaevskii (GP) and Bogoliubov equations to investigate the
metastability of superfluidity in a Bose-Einstein condensate in the presence of a uniformly …

We investigate the stability of nonequilibrium steady states of Bose-Einstein condensates
with a local one-body loss in the presence of double potential barriers. We construct an …

We consider attractive and repulsive condensates in a ring trap stirred by a weak link, and
analyze the spectrum of solitonic trains dragged by the link, by means of analytical …

We investigate the tunneling properties of collective excitations through a domain wall in the
ferromagnetic phase of a spin-1 spinor Bose-Einstein condensate. Within the mean-field …

Bose-Einstein condensates (BECs) confined in a two-dimensional (2D) harmonic trap are
known to possess a hidden 2D Schrödinger symmetry, that is, the Schrödinger symmetry …

The family of exactly solvable potentials for Newton's equation of motion in the one-
dimensional system with quadratic drag force has been determined completely. The …

We investigate tunneling properties of collective modes in the polar phase of a spin-1 spinor
Bose-Einstein condensate (BEC). This spinor BEC state has two kinds of gapless modes (ie …

We study a stability criterion hypothesis for superfluids expressed in terms of the local
density spectral function I n (r, ω) that is applicable to both homogeneous and …

We investigate a phenomenon of creation of excitations in the homogeneous Bose–Einstein
condensate due to an impurity moving with a constant velocity. A simple model is …

We investigate excitations and fluctuations of Bose-Einstein condensates in a two-
dimensional torus with a uniformly moving Gaussian potential by solving the Gross …