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Atomic dynamics in evaporative cooling of trapped alkali atoms in strong magnetic fields | O. H. Pakarinen
; K.-A. Suominen
; | Date: |
27 Oct 1999 | Journal: | Phys. Rev. A 62, 025402 (2000) | Subject: | Atomic Physics | physics.atom-ph | Affiliation: | Helsinki Institute of Physics | Abstract: | We investigate how the nonlinearity of the Zeeman shift for strong magnetic fields affects the dynamics of rf field induced evaporative cooling in magnetic traps. We demonstrate for the 87-Rb and 23-Na F=2 trapping states with wave packet simulations how the cooling stops when the rf field frequency goes below a certain limit (for the 85-Rb F=2 trapping state the problem does not appear). We examine the applicability of semiclassical models for the strong field case as an extension of our previous work [Phys. Rev. A 58, 3983 (1998)]. Our results verify many of the aspects observed in a recent $^{87}$Rb experiment [Phys. Rev. A 60, R1759 (1999)]. | Source: | arXiv, physics/9910043 | Services: | Forum | Review | PDF | Favorites |
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