Oscillatory interaction in a Bose-Einstein condensate: collective and topological excitations
In this work, we theoretically analyze the behavior of a Bose-Einstein condensate when it is submitted to oscillatory interactions. For that, a homogeneous magnetic field is applied, tuned near a Feshbach resonance, and then it is set to oscillate in time. This variation of the magnetic field causes...
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| Format: | doctoral thesis |
| Status: | Published version |
| Publication Date: | 2012 |
| Country: | Brasil |
| Institution: | Universidade de São Paulo (USP) |
| Repository: | Biblioteca Digital de Teses e Dissertações da USP |
| Language: | English |
| OAI Identifier: | oai:teses.usp.br:tde-28052012-152412 |
| Online Access: | http://www.teses.usp.br/teses/disponiveis/76/76131/tde-28052012-152412/ |
| Access Level: | Open access |
| Keyword: | Condensação de Bose-Einstein Excitações coletivos Modos topológicos |
| Summary: | In this work, we theoretically analyze the behavior of a Bose-Einstein condensate when it is submitted to oscillatory interactions. For that, a homogeneous magnetic field is applied, tuned near a Feshbach resonance, and then it is set to oscillate in time. This variation of the magnetic field causes a scattering length oscillation, which oscillates to interatomic interaction. Thus, we study collective and topological excitations due this oscillation in the interaction. In addition, we have seen a coupling between collective modes as well a dynamical phase transition associated to topological excitation |
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