Heating and atom loss during upward ramps of Feshbach resonance levels in Bose-Einstein condensates
The production of pairs of fast atoms leads to a pronounced loss of atoms during upward ramps of Feshbach resonance levels in dilute Bose-Einstein condensates. We provide comparative studies on the formation of these bursts of atoms containing the physical predictions of several theoretical approach...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
31 August 2004
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| In: |
Physical review. A, Atomic, molecular, and optical physics
Year: 2004, Volume: 70, Issue: 2 |
| ISSN: | 1094-1622 |
| DOI: | 10.1103/PhysRevA.70.023613 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevA.70.023613 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.70.023613 
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| Author Notes: | Thorsten Köhler, Krzysztof Góral, and Thomas Gasenzer |
| Summary: | The production of pairs of fast atoms leads to a pronounced loss of atoms during upward ramps of Feshbach resonance levels in dilute Bose-Einstein condensates. We provide comparative studies on the formation of these bursts of atoms containing the physical predictions of several theoretical approaches at different levels of approximation. We show that, despite their very different description of the microscopic binary physics during the passage of a Feshbach resonance, all approaches lead to virtually the same prediction on the total loss of condensate atoms, provided that the ramp of the magnetic field strength is purely linear. We give the reasons for this remarkable insensitivity of the remnant condensate fraction to the microscopic physical processes and compare the theoretical predictions with recent Feshbach resonance crossing experiments on 23Na and 85Rb. |
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| Item Description: | Gesehen am 09.08.2019 |
| Physical Description: | Online Resource |
| ISSN: | 1094-1622 |
| DOI: | 10.1103/PhysRevA.70.023613 |