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Scaling and thermodynamics of a trapped Bose-condensed gas
S. Giorgini, L. Pitaevskii, S. Stringari
We investigate the thermodynamics of a Bose gas interacting with repulsive forces and confined in a harmonic trap. We show that the relevant parameters of the system (temperature,…
Nonlinear Dynamics of a Bose Condensed Gas
F. Dalfovo, C. Minniti, S. Stringari +1
We investigate the dynamic behavior of a Bose-condensed gas of alkali atoms interacting with repulsive forces and confined in a magnetic trap at zero temperature. Using the Thomas-…
Quantum Evaporation from Superfluid Helium at Normal Incidence
F. Dalfovo, M. Guilleumas, A. Lastri +2
We study the scattering of atoms, rotons and phonons at the free surface of He at normal incidence and calculate the evaporation, condensation and reflection probabilities. Ass…
Condensate fraction and critical temperature of a trapped interacting Bose gas
S. Giorgini, L. Pitaevskii, S. Stringari
By using a mean field approach, based on the Popov approximation, we calculate the temperature dependence of the condensate fraction of an interacting Bose gas confined in an aniso…
Order Parameter at the Boundary of a Trapped Bose Gas
F. Dalfovo, L. Pitaevskii, S. Stringari
Through a suitable expansion of the Gross-Pitaevskii equation near the classical turning point, we obtain an explicit solution for the order parameter at the boundary of a trapped…
Collective excitations of a trapped Bose-condensed gas
S. Stringari
By taking the hydrodynamic limit we derive, at , an explicit solution of the linearized time dependent Gross-Pitaevskii equation for the order parameter of a Bose gas confined…