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Bimodal momentum di...
Bimodal momentum distribution of laser-cooled atoms in optical lattices
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- Dion, Claude, 1970- (author)
- Umeå universitet,Institutionen för fysik
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- Jonsell, Svante (author)
- Stockholms universitet,Fysikum
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- Kastberg, Anders (author)
- University of Nice
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- Sjölund, Peder (author)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- 2016
- 2016
- English.
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In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 93:5
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Abstract
Subject headings
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- We study, numerically and experimentally, the momentum distribution of atoms cooled in optical lattices. Using semiclassical simulations, we show that this distribution is bimodal, made up of a central feature corresponding to "cold," trapped atoms, with tails of "hot," untrapped atoms, and that this holds true also for very shallow potentials. Careful analysis of the distribution of high-momentum untrapped atoms, both from simulations and experiments, shows that the tails of the distribution do not follow a normal law, hinting at a power-law distribution and nonergodic behavior. We also revisit the phenomenon leading to the existence of an optimal cooling point, i.e., a potential depth below which the temperature of the atoms starts increasing.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- fysik
- Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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