[institut] Podsetnik, danas je SCL seminar: Nonlinear excitations in BECs, Antun Balaz, petak 19. april u 14:00

[Nenad Vukmirovic]

Postovane koleginice i kolege,

Podsecam vas da ce se danas odrzati dole najavljeni seminar.

Srdacan pozdrav,

-- 
Dr Nenad Vukmirovic,
Visi naucni saradnik,
Laboratorija za primenu racunara u nauci,
Institut za fiziku Beograd,
Srbija.
URL: http://www.scl.rs/nenad
On 04/15/2013 11:47 AM, Nenad Vukmirovic wrote:
> Postovane koleginice i kolege,
>
> Pozivam vas na SCL seminar koji ce u petak 19. aprila 2013. godine u
> 14:00 u citaonici Instituta za fiziku odrzati Antun Balaz (SCL, Institut
> za fiziku u Beogradu). Naslov seminara i apstrakt su dati u nastavku ove
> poruke.
>
> Nonlinear Excitations in Bose-Einstein Condensates: Parametric and
> Geometric Resonances
>
> Abstract:
>
> Bose-Einstein Condensates (BECs) are inherently nonlinear quantum
> systems, which leads to a number of interesting effects. Modulation of
> some of the parameters of a BEC can give rise to prominent nonlinear
> features, such as shifts in the frequencies of collective oscillation
> modes, higher harmonics generation, and resonant mode coupling. In a
> recent experiment, a Bose-Einstein condensate of Li-7 has been excited
> by a harmonic modulation of the atomic s-wave scattering length.
> Combining an analytical perturbative approach with extensive numerical
> simulations, we will analyze the emerging nonlinear dynamics of the
> system on the mean-field level at zero temperature. We will present
> resulting excitation spectra and main nonlinear effects close to
> parametric resonances. We will also discuss geometric resonances in BECs
> with two-body and three-body contact interactions, where even a geometry
> of the trapping potential leads to the emergence of nonlinear effects,
> frequency shifts and resonant mode coupling.
>
> Srdacan pozdrav,
>