Evaporative cooling of cesium atoms in the gravito-optical surface trap

@article{Hammes2000EvaporativeCO,
  title={Evaporative cooling of cesium atoms in the gravito-optical surface trap},
  author={M. Hammes and D. Rychtarik and R. Grimm},
  journal={Comptes Rendus De L Academie Des Sciences Serie Iv Physique Astrophysique},
  year={2000},
  volume={2},
  pages={625-631}
}
Abstract We report on cooling of an atomic cesium gas closely above an evanescent-wave atom mirror. Our first evaporation experiments show a temperature reduction from 10 μK down to 300 nK along with a gain in phase-space density of almost two orders of magnitude. In a series of measurements of heating and spin depolarization an incoherent background of resonant photons in the evanescent-wave diode laser light was found to be the limiting factor at this stage. 
4 Citations
Vacuum fluctuations and moving atoms/detectors: From Casimir-Polder to Unruh effect
In this note we review some recent results on corrections to the Casimir?Polder retardation force due to atomic motion and present a preliminary critique on one recently proposed cavity QED schemeExpand
Inelastic bouncing and optical trapping of cold atoms
Disclaimer/Complaints regulations If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons.Expand
Chain-like beams with phase singularity
The investigation of the first order Bessel beam diffraction on a binary amplitude diffraction mask with two open zones has been performed. It has been shown by computer modeling and experimentallyExpand

References

SHOWING 1-10 OF 13 REFERENCES
Optical and evaporative cooling of caesium atoms in the gravito-optical surface trap
Abstract We report on cooling of an atomic caesium gas closely above an evanescent-wave atom mirror. At high densities, optical cooling based on inelastic reflections is found to be limited by aExpand
Gravitational laser trap for atoms with evanescent-wave cooling.
Abstract We propose a trap based on an evanescent light wave formed on the surface of a pyramidal hollow in a glass substrate. Alkali atoms repeatedly reflected at the evanescent wave and kept inExpand
Observation of Low-Field Feshbach Resonances in Collisions of Cesium Atoms
We observe several Feshbach resonances in magnetic fields below 40 G for Cs atoms trapped in a 1D optical lattice. One resonance occurs in the lowest-energy ground state F ­ 3, mF ­ 3 which is stableExpand
Surface Trap for Cs atoms based on Evanescent-Wave Cooling
We demonstrate a gravito-optical surface trap for Cs atoms which exploits cooling in an evanescent light wave. About 10{sup 5} atoms were cooled down to 3{mu}K and formed a sample with a mean heightExpand
An atomic trap based on evanescent light waves
A new type of gradient light trap is suggested for neutral atoms, based on the evanescent fields of two laser beams experiencing total internal reflection at a dielectric- vacuum interface. AExpand
Atomic Scattering in the Presence of an External Confinement and a Gas of Impenetrable Bosons
We calculate, within the pseudopotential approximation, a one-dimensional scattering amplitude and effective one-dimensional interaction potential for atoms confined transversally by an atomExpand
Generation of a hollow laser beam for atom trapping using an axicon
Abstract We demonstrate a simple method to produce a hollow laser beam for applications in atom trapping using an axicon. We obtain a beam profile having the shape of a ring with a diameter of ∼800Expand
Bose-einstein condensation in quasi-2D trapped gases
TLDR
It is found that well below the transition temperature T(c) the equilibrium state is a true condensate, whereas at intermediate temperatures T<T( c) one has a quasicondensate (condensate with fluctuating phase). Expand
Observation of a Zero-Energy Resonance in Cs-Cs Collisions
During the past few years ultracold binary atomic col-lisions have gained a renewed and broad interest sincethey play a key role in the understanding of the proper-ties of Bose-Einstein condensatesExpand
Measurement of elastic cross section for cold cesium collisions
We have measured the time taken for a magnetically trapped cloud of cold cesium atoms in the ${(F=3,m}_{F}=\ensuremath{-}3)$ ground state to rethermalize from a nonequilibrium spatial and velocityExpand
...
1
2
...