When atoms in a gas are cooled to extremely low temperatures, they will—under the
appropriate conditions—condense into a single quantum-mechanical state known as a Bose …

We calculated, within the Gross-Pitaevskii formalism, the critical number of atoms for Bose-
Einstein condensates with two-body attractive interactions in cylindrical traps with different …

Nonlinear coherent modes are the collective states of trapped Bose atoms, corresponding to
different energy levels. These modes can be created starting from the ground-state …

This thesis describes experiments with a novel state of matter that only exists at very low
temperature, known as a Bose-Einstein condensate or BEC. The different atoms in a BEC …

Coherent resonance is the effect of resonant excitation of nonlinear coherent modes in
trapped Bose condensates. This novel effect is shown to be feasible for Bose-condensed …

We apply controlled perturbation theory to calculate the spectrum of the Gross-Pitaevskii
equation for a system composed of attractive bosons confined in an anisotropic harmonic …

The atom optics of Bose-Einstein condensates containing a vortex of circulation one is
discussed. We first analyze in detail the reflection of such a condensate falling on an atomic …

We study the dynamical stability of Bose–Einstein condensates in an optical lattice with a
time-periodic modulation potential and a constant acceleration force simultaneously. We …

We study dynamics of a wavefunction for the nonlinear Schrödinger equation with attractive
self-interaction under a harmonic potential. By use of the variance identity and a rigorous …

In this thesis the zero temperature properties (T= 0) of a dipolar condensate are investigated.
For atoms with isotropic and short ranged interactions, low temperature tow-body interaction …