Cold and dense clouds of atoms in a holographic atom trap

Andira Ramos, Yun-Jhih Chen, Jamie MacLennan +1 more

Jennifer Sebby-Strabley

Raymond Newell, Jennifer Sebby-Strabley, Thad G Walker

We demonstrate the production of high-density cold 87Rb samples (2 x 10(14) atoms/cm3) in a simple optical lattice formed with YAG light that is diffracted from a holographic phase plate. A loading protocol is described that results in 10,000 atoms per 10 microm x 10 microm x 100 microm unit cell of the lattice site. Rapid free evaporation leads to a temperature of 50 microK and phase space densities of 1/150 within 50 ms. The resulting small, high-density atomic clouds are very attractive for a number of experiments, including ultracold Rydberg atom physics.

Roee Ozeri, Lev Khaykovich, Nir Davidson

M. Rauner, M. Schifler, G. Wokurka +6 more

К. А. Баранцев, A. N. Litvinov, Г. В. Волошин +1 more

This work is devoted to the Ramsey method (by means of pulsed radiation) of detection of the coherent population trapping resonance in the cold atomic cloud. We investigate the effect of an optically dense medium on the form and light shift of Ramsey resonance. The main result is to find the optimal ratio between intensities of the frequency components of radiation which suppresses the light shift for arbitrary dipole moments of atomic transitions.