Vortex velocity field in inhomogeneous media: A numerical study in Bose-Einstein condensates
We present a numerical calculation of the velocity field of an off-axis vortex within a harmonic trapping potential. We consider a condensate with a large number of particles which, in spite of being in the Thomas-Fermi regime, possesses a non-totally-negligible vortex core size. Via a simple, yet r...
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paper:paper_10502947_v77_n4_p_Jezek2023-06-08T16:02:27Z Vortex velocity field in inhomogeneous media: A numerical study in Bose-Einstein condensates Jezek, Dora Marta Cataldo, Horacio Máximo Bose-Einstein condensation Fermi level Molecular physics Optical systems Vortex flow Harmonic trapping Thomas-Fermi regime Vortex core size Vortex velocity fields Flow velocity We present a numerical calculation of the velocity field of an off-axis vortex within a harmonic trapping potential. We consider a condensate with a large number of particles which, in spite of being in the Thomas-Fermi regime, possesses a non-totally-negligible vortex core size. Via a simple, yet realistic, modeling of the vortex-state density, we derive, by treating the equation of continuity outside and inside the vortex core, respective equations for the velocity field and the vortex precession velocity. We find that the vortex precession velocity is given by two contributions: the background velocity field evaluated around the border of the core and another term which depends on the core shape. Our findings concerning the velocity field outside the vortex core are in good agreement with previous theoretical predictions in a narrow region around it, while far away from the vortex we observe a field with a large asymmetry with respect to the vortex position. We show that a better approximation may be obtained by adding the velocity field produced by an antivortex located outside the condensate. © 2008 The American Physical Society. Fil:Jezek, D.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cataldo, H.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v77_n4_p_Jezek http://hdl.handle.net/20.500.12110/paper_10502947_v77_n4_p_Jezek |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Bose-Einstein condensation Fermi level Molecular physics Optical systems Vortex flow Harmonic trapping Thomas-Fermi regime Vortex core size Vortex velocity fields Flow velocity |
| spellingShingle |
Bose-Einstein condensation Fermi level Molecular physics Optical systems Vortex flow Harmonic trapping Thomas-Fermi regime Vortex core size Vortex velocity fields Flow velocity Jezek, Dora Marta Cataldo, Horacio Máximo Vortex velocity field in inhomogeneous media: A numerical study in Bose-Einstein condensates |
| topic_facet |
Bose-Einstein condensation Fermi level Molecular physics Optical systems Vortex flow Harmonic trapping Thomas-Fermi regime Vortex core size Vortex velocity fields Flow velocity |
| description |
We present a numerical calculation of the velocity field of an off-axis vortex within a harmonic trapping potential. We consider a condensate with a large number of particles which, in spite of being in the Thomas-Fermi regime, possesses a non-totally-negligible vortex core size. Via a simple, yet realistic, modeling of the vortex-state density, we derive, by treating the equation of continuity outside and inside the vortex core, respective equations for the velocity field and the vortex precession velocity. We find that the vortex precession velocity is given by two contributions: the background velocity field evaluated around the border of the core and another term which depends on the core shape. Our findings concerning the velocity field outside the vortex core are in good agreement with previous theoretical predictions in a narrow region around it, while far away from the vortex we observe a field with a large asymmetry with respect to the vortex position. We show that a better approximation may be obtained by adding the velocity field produced by an antivortex located outside the condensate. © 2008 The American Physical Society. |
| author |
Jezek, Dora Marta Cataldo, Horacio Máximo |
| author_facet |
Jezek, Dora Marta Cataldo, Horacio Máximo |
| author_sort |
Jezek, Dora Marta |
| title |
Vortex velocity field in inhomogeneous media: A numerical study in Bose-Einstein condensates |
| title_short |
Vortex velocity field in inhomogeneous media: A numerical study in Bose-Einstein condensates |
| title_full |
Vortex velocity field in inhomogeneous media: A numerical study in Bose-Einstein condensates |
| title_fullStr |
Vortex velocity field in inhomogeneous media: A numerical study in Bose-Einstein condensates |
| title_full_unstemmed |
Vortex velocity field in inhomogeneous media: A numerical study in Bose-Einstein condensates |
| title_sort |
vortex velocity field in inhomogeneous media: a numerical study in bose-einstein condensates |
| publishDate |
2008 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v77_n4_p_Jezek http://hdl.handle.net/20.500.12110/paper_10502947_v77_n4_p_Jezek |
| work_keys_str_mv |
AT jezekdoramarta vortexvelocityfieldininhomogeneousmediaanumericalstudyinboseeinsteincondensates AT cataldohoraciomaximo vortexvelocityfieldininhomogeneousmediaanumericalstudyinboseeinsteincondensates |
| _version_ |
1768543908254449664 |