Measurements of Rb trap-loss collision spectra

Hoffmann, D.; Feng, P.Y.; Walker, Thad

doi:10.1364/josab.11.000712

Cited by 41 publications

(27 citation statements)

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“…Two atoms per site corresponds to an effective density of n = 1.1×10 1 initial − Γ 10 cm -3 at the doppler temperature. The loss rate due to light assisted collisions at this density for the intensity and detuning of our cooling beams is Γ light = 0.02 s −1 [20,21], which is consistent with the fast initial loss rate for the continuous cooling data in Fig. 5.…”

supporting

confidence: 77%

Achieving very long lifetimes in optical lattices with pulsed cooling

et al. 2008

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We have realized a one dimensional optical lattice for individual atoms with a lifetime >300 s, which is 5 times longer than previously reported. In order to achieve this long lifetime, it is necessary to laser cool the at-oms briefly every 20 s to overcome heating due to technical fluctuations in the trapping potential. Without cooling, we observe negligible atom loss within the first 20 s followed by an exponential decay with a 62 s time constant. We obtain quantitative agreement with the measured fluctuations of the trapping potential and the corresponding theoretical heating rates.Comment: 4 pages, 5 figure

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supporting

confidence: 77%

Achieving very long lifetimes in optical lattices with pulsed cooling

et al. 2008

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“…8B), the profiles deviate from a Gaussian and get quite close to the flat-top shapes of ref. [17,19]. This is accompanied by a steepening of the wings of the profiles, which is a prediction of all models including multiple scattering [2,7,19].…”

Section: Vlmot Shapementioning

confidence: 68%

“…[17], and well fitted to the functional dependence introduced by the authors of ref. [19] to account for multiple scattering and finite temperature. The difference between all these experimental findings is not elucidated, but we note that flat-top profiles can also be due to multiple scattering of the illuminating light even if the density distribution is Gaussian, as discussed before.…”

Section: Vlmot Shapementioning

confidence: 99%

Scaling behavior of a very large magneto-optical trap

Camara¹,

Kaiser²,

Labeyrie³

2014

Phys. Rev. A

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We investigate the scaling behavior of a very large magneto-optical trap (VLMOT) containing up to 1.4 × 10 11 Rb 87 atoms. By varying the diameter of the trapping beams, we are able to change the number of trapped atoms by more than 5 orders of magnitude. We then study the scaling laws of the loading and size of the VLMOT, and analyze the shape of the density profile in this regime where the Coulomb-like, light-mediated repulsive interaction between atoms is expected to play an important role.

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“…Fluorescence measurements of the MOT cloud taken with a camera placed on the x axis revealed a flattened density profile indicative of radiation trapping effects [5,10,28]. This type of profile has previously been modeled with a Fermi-Dirac type distribution [29]. We chose to use an expansion with more fitting parameters of the form …”

Section: Methodsmentioning

confidence: 99%

Experimental study of nonlinear focusing in a magneto-optical trap using a Z-scan technique

Wang

Saffman

2004

Phys. Rev. A

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We present an experimental study of Z-scan measurements of the nonlinear response of cold Cs atoms in a magneto-optical trap. Numerical simulations of the Z-scan signal accounting for the nonuniform atomic density agree with experimental results at large probe beam detunings. At small probe detunings a spatially varying radiation force modifies the Z-scan signal. We also show that the measured scan is sensitive to the atomic polarization distribution.

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Measurements of Rb trap-loss collision spectra

Cited by 41 publications

References 0 publications

Achieving very long lifetimes in optical lattices with pulsed cooling

Achieving very long lifetimes in optical lattices with pulsed cooling

Scaling behavior of a very large magneto-optical trap

Experimental study of nonlinear focusing in a magneto-optical trap using a Z-scan technique

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