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SUMMARY:Formation of Faraday and Resonant Waves in Driven High-Density Bos
 e-Einstein Condensates
DTSTART;VALUE=DATE-TIME:20121018T134500Z
DTEND;VALUE=DATE-TIME:20121018T150000Z
DTSTAMP;VALUE=DATE-TIME:20261011T025103Z
UID:indico-contribution-198@indico.ipb.ac.rs
DESCRIPTION:Speakers: Mihaela Carina Raportaru (Horia Hulubei National Ins
 titute for Physics and Nuclear Engineering)\nExtended parametric resonance
 s are one of the recurrent themes in the dynamics of quantum gases. Follow
 ing some inceptive theoretical works Faraday waves have been observed in p
 arametrically driven 87Rb BECs and 4He cells subject to vertical vibration
 s. These experimental observations have catalyzed the research activities 
 and many theoretical investigations followed shortly. Among them we mentio
 n the emergence of density waves in dipolar and binary condensates\, the t
 ransition to miscibility observed in non-miscible condensates and the supp
 ression of Faraday waves in condensates loaded into optical lattices.  \n\
 nIn this work we present the variational method introduced in Ref. [1] to 
 describe the dynamics of cigar-shaped Bose-Einstein condensates of high de
 nsity subject to periodic modulations of the radial component of the confi
 ning potential. The key ingredient of the variational treatment is the q-G
 aussian radial envelope which describes the Thomas-Fermi regime of the con
 densate. A longitudinal density wave is grafted to the ansatz to account f
 or Faraday and resonant waves. Using the variational equations\, we invest
 igate the dynamics of a realistic condensate for frequencies close to the 
 radial frequency of the trap and show the emergence of the Faraday waves e
 xcited outside of resonance and that of the resonant wave that appears str
 aight on resonance.\n\n[1] M. C. Raportaru\, Romanian Reports in Physics 6
 4\, 105\, 2012.\n\nhttps://events.saifa.rs/event/291/contributions/198/
LOCATION:National Library of Serbia
URL:https://events.saifa.rs/event/291/contributions/198/
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