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Abstract:

We evaluate the extraction of angular momentum from quantized vortices in trapped Bose-Einstein condensates. Within a variational approach we show that the energy barrier between the ground state and the state containing an axisymmetric vortex can be crossed in a scattering process by density perturbations. The transfer of angular momentum can be made total for suitably chosen density perturbations carrying about 10% of the ground-state energy, irrespectively of the number of particles in the condensate. A similar pattern is reproduced by the full solution of the Gross-Pitaevskii equation, although interference and diffusion effects are now seen to limit the efficiency of the process. © 2008 The American Physical Society.

Registro:

Documento: Artículo
Título:Annihilation of quantized vorticity in a trapped Bose-Einstein condensate via the scattering of density perturbations
Autor:Capuzzi, P.; Federici, F.; Tosi, M.P.
Filiación:Consejo Nacional de Investigaciones Científicas y Técnicas, Departamento de Física, Universidad de Buenos Aires, RA-1428 Buenos Airesc, Argentina
NEST-CNR-INFM and Classe di Scienze, Scuola Normale Superiore, I-56126 Pisa, Italy
Palabras clave:Angular momentum; Bose-Einstein condensation; Ground state; Perturbation techniques; Steam condensers; Axisymmetric vortex; Bose-Einstein condensates; Density perturbations; Diffusion effects; Energy-barrier; Gross-Pitaevskii equation; Ground-state energies; Quantized vortices; Scattering processes; Similar pattern; Trapped Bose-Einstein condensate; Variation AL approach; Vortex flow
Año:2008
Volumen:78
Número:2
DOI: http://dx.doi.org/10.1103/PhysRevA.78.023604
Título revista:Physical Review A - Atomic, Molecular, and Optical Physics
Título revista abreviado:Phys Rev A
ISSN:10502947
CODEN:PLRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v78_n2_p_Capuzzi

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Citas:

---------- APA ----------
Capuzzi, P., Federici, F. & Tosi, M.P. (2008) . Annihilation of quantized vorticity in a trapped Bose-Einstein condensate via the scattering of density perturbations. Physical Review A - Atomic, Molecular, and Optical Physics, 78(2).
http://dx.doi.org/10.1103/PhysRevA.78.023604
---------- CHICAGO ----------
Capuzzi, P., Federici, F., Tosi, M.P. "Annihilation of quantized vorticity in a trapped Bose-Einstein condensate via the scattering of density perturbations" . Physical Review A - Atomic, Molecular, and Optical Physics 78, no. 2 (2008).
http://dx.doi.org/10.1103/PhysRevA.78.023604
---------- MLA ----------
Capuzzi, P., Federici, F., Tosi, M.P. "Annihilation of quantized vorticity in a trapped Bose-Einstein condensate via the scattering of density perturbations" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 78, no. 2, 2008.
http://dx.doi.org/10.1103/PhysRevA.78.023604
---------- VANCOUVER ----------
Capuzzi, P., Federici, F., Tosi, M.P. Annihilation of quantized vorticity in a trapped Bose-Einstein condensate via the scattering of density perturbations. Phys Rev A. 2008;78(2).
http://dx.doi.org/10.1103/PhysRevA.78.023604