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SUMMARY:Nonlinear Excitations in Bose-Einstein Condensates: Parametric and
  Geometric Resonances\, Faraday Waves
DTSTART;VALUE=DATE-TIME:20130123T110000Z
DTEND;VALUE=DATE-TIME:20130123T120000Z
DTSTAMP;VALUE=DATE-TIME:20261011T141334Z
UID:indico-event-378@indico.ipb.ac.rs
DESCRIPTION:Bose-Einstein Condensates (BECs) are inherently nonlinear quan
 tum systems\, which leads to a number of interesting effects. Modulation o
 f some of the parameters of a BEC can give rise to prominent nonlinear fea
 tures\, such as shifts in the frequencies of collective oscillation modes\
 , higher harmonics generation\, and resonant mode coupling. In a recent ex
 periment\, a Bose-Einstein condensate of Li-7 has been excited by a harmon
 ic modulation of the atomic s-wave scattering length. Combining an analyti
 cal perturbative approach with extensive numerical simulations\, we will a
 nalyze the emerging nonlinear dynamics of the system on the mean-field lev
 el at zero temperature. We will present resulting excitation spectra and m
 ain nonlinear effects close to parametric resonances. We will also discuss
  geometric resonances in BECs with two-body and three-body contact interac
 tions\, where even a geometry of the trapping potential leads to the emerg
 ence of nonlinear effects\, frequency shifts and resonant mode coupling.\n
 \nhttps://events.saifa.rs/event/378/
LOCATION:
URL:https://events.saifa.rs/event/378/
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