Magneto-Optical Trapping and Cooling of Strontium Atoms down to the Photon Recoil Temperature

Katori, Hidetoshi; Ido, T.; Isoya, Yoshitomo; Kuwata‐Gonokami, Makoto

doi:10.1103/physrevlett.82.1116

Cited by 339 publications

(298 citation statements)

References 21 publications

Supporting

Mentioning

288

Contrasting

Order By: Relevance

“…Note also that such divergences are very familiar: the wings of a Lorentz distribution are also known to cause a divergence of the rms value of the distribution. One can also recall that in the case of narrow line cooling, the rms velocity diverges [41,42] when one approaches the atomic resonance, and that for very small detunings one can no longer even have a normalized distribution function [41]. Double Gaussian functions -Fitting the recorded (experimental or numerical) distribution functions to double Gaussians works even better than the Tsallis function.…”

Section: A Summary Of Our Resultsmentioning

confidence: 99%

Non-Gaussian velocity distributions in optical lattices

et al. 2004

View full text Add to dashboard Cite

We present a detailed experimental study of the velocity distribution of atoms cooled in an optical lattice. Our results are supported by full-quantum numerical simulations. Even though the Sisyphus effect, the responsible cooling mechanism, has been used extensively in many cold atom experiments, no detailed study of the velocity distribution has been reported previously. For the experimental as well as for the numerical investigation, it turns out that a Gaussian function is not the one that best reproduce the data for all parameters. We also fit the data to alternative functions, such as Lorentzians, Tsallis functions and double Gaussians. In particular, a double Gaussian provides a more precise fitting to our results.

show abstract

Section: A Summary Of Our Resultsmentioning

confidence: 99%

Non-Gaussian velocity distributions in optical lattices

et al. 2004

View full text Add to dashboard Cite

show abstract

“…For Sr Ref. [5] have nearly reached the quantum degeneracy regime. Optical clocks based on the ultra-cold calcium have been constructed for Mg [2] and Ca [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Scattering length of the ground-stateMg+Mgcollision

Tiesinga¹,

Kotochigova²,

Julienne³

2002

Phys. Rev. A

View full text Add to dashboard Cite

We have constructed the X 1 Σ + g potential for the collision between two ground state Mg atoms and analyzed the effect of uncertainties in the shape of the potential on scattering properties at ultra-cold temperatures. This potential reproduces the experimental term values to 0.2 cm −1 and has a scattering length of +1.4(5) nm where the error is prodominantly due to the uncertainty in the dissociation energy and the C 6 dispersion coefficient. A positive sign of the scattering length suggests that a Bose-Einstein condensate of ground state Mg atoms is stable.

show abstract

“…The red beam is overlapped to the blue beam on a dichroic mirror and from this point the two beams share the same broadband optics (mirrors, cubes, waveplates) up to the atoms. The recapture process involves a 200 ms long broadband phase to capture and further cool the atoms after which they are held in a single-frequency MOT which lasts for 40 ms [4]. During this last phase the red MOT beam intensity is decreased in order to further cool the atoms.…”

Section: Cooling and Trapping Strontiummentioning

confidence: 99%

“…1) allows the possibility to directly cool strontium with standard Doppler cooling techniques to temperatures well below 1 K using two steps of trapping and cooling in magneto-optical trap working on the dipole allowed 1 S 0 -1 P 1 at 461 nm and on the 1 S 0 -3 P 1 transition. As a result of the efficient double-stage Doppler cooling [4], strontium is a promising candidate to reach quantum degeneracy. Secondstage Doppler cooling working on the 1 S 0 -3 P 1 intercombination transition (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Laser sources for precision spectroscopy on atomic strontium

Poli

Ferrari

Prevedelli

et al. 2006

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

View full text Add to dashboard Cite

We present a new laser setup designed for high-precision spectroscopy on laser cooled atomic strontium. The system, which is entirely based on semiconductor laser sources, delivers 200 mW at 461 nm for cooling and trapping atomic strontium from a thermal source, 4 mW at 497 nm for optical pumping from the metastable 3 P 2 state, 12 mW at 689 nm on linewidth less than 1 kHz for second-stage cooling of the atomic sample down to the recoil limit, 1.2 W at 922 nm for optical trapping close to the "magic wavelength" for the 0-1 intercombination line at 689 nm. The 689 nm laser was already employed to perform a frequency measurement of the 0-1 intercombination line with a relative accuracy of 2.3 × 10 −11 , and the ensemble of laser sources allowed the loading in a conservative dipole trap of multi-isotopes strontium mixtures. The simple and compact setup developed represents one of the first steps towards the realization of a transportable optical standards referenced to atomic strontium.

show abstract

Magneto-Optical Trapping and Cooling of Strontium Atoms down to the Photon Recoil Temperature

Cited by 339 publications

References 21 publications

Non-Gaussian velocity distributions in optical lattices

Non-Gaussian velocity distributions in optical lattices

Scattering length of the ground-stateMg+Mgcollision

Laser sources for precision spectroscopy on atomic strontium

Contact Info

Product

Resources

About