SOLITONS GRIS, PHONONS ET DISSIPATION DANS UN CONDENSAT DE BOSE-EINSTEIN QUASI-UNIDIMENSIONNEL

In contrast, the equilibrium steady state of a weakly interacting Bose gas which undergoes condensation because of atomic collisions as predicted by our master equation theory

For a gas confined in a harmonic potential, the fast rotation domain corresponds to stirring frequencies Ω of the order of the trapping frequency ω ⊥ in the plane perpendicular to

Le condensat de Bose-Einstein ainsi obtenu est ensuite utilis´e pour des exp´eriences de transfert dans un pi`ege magn´etique habill´e par un champ radiofr´equence ou dans un

For an isolated system with energy fluctuations in the initial state, we have seen that the correlation function C(t) of the condensate phase derivative does not vanish at long

The problem of diffuse reflection of atoms off an evanescent wave mirror has been addressed theoretically in Ref [12] and it linked to the scattering of light by the defects of a

Here we show that is not the inertial mass but the gravitational mass of the BEC that becomes negative, due to the electromagnetic energy absorbed from the trap and the Raman beams

In the presence of the optical lattice we observe that the widths of the resonances corresponding to the excitations in bands II and III lie within the experimental range of

We show in particular that in this strongly degenerate limit the shape of the spatial correlation function is insensitive to the transverse regime of confinement, pointing out to