Collective excitations of a dipolar Bose-Einstein condensate
We have measured the effect of dipole-dipole interactions on the frequency of a collective mode of a Bose-Einstein condensate. At relatively large numbers of atoms, the experimental measurements are in good agreement with zero temperature theoretical predictions based on the Thomas-Fermi approach. E...
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| Veröffentlicht in: | Physical review letters 2010-07, Vol.105 (4), p.040404-040404, Article 040404 |
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| container_end_page | 040404 |
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| container_issue | 4 |
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| container_title | Physical review letters |
| container_volume | 105 |
| creator | Bismut, G Pasquiou, B Maréchal, E Pedri, P Vernac, L Gorceix, O Laburthe-Tolra, B |
| description | We have measured the effect of dipole-dipole interactions on the frequency of a collective mode of a Bose-Einstein condensate. At relatively large numbers of atoms, the experimental measurements are in good agreement with zero temperature theoretical predictions based on the Thomas-Fermi approach. Experimental results obtained for the dipolar shift of a collective mode show a larger dependency to both the trap geometry and the atom number than the ones obtained when measuring the modification of the condensate aspect ratio due to dipolar forces. These findings are in good agreement with simulations based on a Gaussian ansatz. |
| doi_str_mv | 10.1103/physrevlett.105.040404 |
| format | Article |
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At relatively large numbers of atoms, the experimental measurements are in good agreement with zero temperature theoretical predictions based on the Thomas-Fermi approach. Experimental results obtained for the dipolar shift of a collective mode show a larger dependency to both the trap geometry and the atom number than the ones obtained when measuring the modification of the condensate aspect ratio due to dipolar forces. 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At relatively large numbers of atoms, the experimental measurements are in good agreement with zero temperature theoretical predictions based on the Thomas-Fermi approach. Experimental results obtained for the dipolar shift of a collective mode show a larger dependency to both the trap geometry and the atom number than the ones obtained when measuring the modification of the condensate aspect ratio due to dipolar forces. 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| ispartof | Physical review letters, 2010-07, Vol.105 (4), p.040404-040404, Article 040404 |
| issn | 0031-9007 1079-7114 |
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| source | American Physical Society Journals |
| subjects | ASPECT RATIO ATOMIC MODELS ATOMS BOSE-EINSTEIN CONDENSATION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COLLECTIVE EXCITATIONS Condensed Matter DIMENSIONLESS NUMBERS DIPOLES ENERGY-LEVEL TRANSITIONS EXCITATION GEOMETRY INTERACTIONS MATHEMATICAL MODELS MATHEMATICS MODIFICATIONS MULTIPOLES Physics Quantum Gases Quantum Physics SIMULATION THOMAS-FERMI MODEL TRAPPING |
| title | Collective excitations of a dipolar Bose-Einstein condensate |
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