Many-body theory of inhomogeneous superfluids
timetable:
Mon 16 Jul, 9:25 - 9:50, Aula Dini
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Vortex annihilation in a trapped Bose-Einstein condensate via scattering of density perturbations
speaker: Francesca Federici (Scuola Normale Superiore di Pisa)abstract: The extraction of angular momentum from vortices in trapped Bose-Einstein condensates is investigated. Using a variational approach, it is shown that the energy barrier between the ground state and the metastable state containing an axis-symmetric vortex can be surpassed by means of a scattering process with density perturbations. The transfer of angular momentum can be made total for suitably chosen density perturbations carrying an energy of about 10% of the ground-state energy, irrespective of the number of particles.
timetable:
Mon 16 Jul, 9:25 - 9:50, Aula Dini
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