Cold atom confinement in an all-optical dark ring trap

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dc.creatorOlson, Spencer E.
dc.creatorTerraciano, Matthew L.
dc.creatorBashkansky, Mark
dc.creatorFatemi, Fredrik K.
dc.date2008-02-08
dc.date.accessioned2026-07-07T09:19:45Z
dc.date.available2026-07-07T09:19:45Z
dc.descriptionWe demonstrate confinement of $^{85}$Rb atoms in a dark, toroidal optical trap. We use a spatial light modulator to convert a single blue-detuned Gaussian laser beam to a superposition of Laguerre-Gaussian modes that forms a ring-shaped intensity null bounded harmonically in all directions. We measure a 1/e spin-relaxation lifetime of ~1.5 seconds for a trap detuning of 4.0 nm. For smaller detunings, a time-dependent relaxation rate is observed. We use these relaxation rate measurements and imaging diagnostics to optimize trap alignment in a programmable manner with the modulator. The results are compared with numerical simulations.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0802.1213
dc.identifierhttp://arxiv.org/abs/0802.1213
dc.identifierPhys. Rev. A 76, 061404(R) (2007)
dc.identifierdoi:10.1103/PhysRevA.76.061404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/154508
dc.subjectQuantum Physics
dc.titleCold atom confinement in an all-optical dark ring trap
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