Heating and atom loss during upward ramps of Feshbach resonance levels in Bose-Einstein condensates

• Verfasst von: Köhler, Thorsten [VerfasserIn]
• Verfasst von: Góral, Krzysztof [VerfasserIn]
• Verfasst von: Gasenzer, Thomas [VerfasserIn]
• Titel: Heating and atom loss during upward ramps of Feshbach resonance levels in Bose-Einstein condensates
• Verf.angabe: Thorsten Köhler, Krzysztof Góral, and Thomas Gasenzer
• E-Jahr: 2004
• Jahr: 31 August 2004
• Umfang: 11 S.
• Fussnoten: Gesehen am 09.08.2019
• Titel Quelle: Enthalten in: Physical review / A
• Ort Quelle: College Park, Md., 1970
• Jahr Quelle: 2004
• Band/Heft Quelle: 70(2004,2) Artikel-Nummer 023613, 11 Seiten
• ISSN Quelle: 1094-1622
• DOI: doi:10.1103/PhysRevA.70.023613
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1570432325

Abstract

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.