We report on an investigation of loading characteristics of deep microscopic dipole traps. The dipole trap is loaded from a low density magneto optical trap (MOT) containing $\approx 5\times 10^{6}$ atoms. We determine the loading parameters that maximize the trapped atom number for a trap of waist 5 μm with trap depths ranging from 3.5 mK to 10 mK. We determine the optimal trap loading conditions and the loading rates, loss coefficients and temperature of the trapped atoms under these conditions. We show that it is possible to load a few hundred to thousand atoms in dipole traps of depth 3.5 mK to 8.5 mK under the optimal loading conditions.We report on an investigation of loading characteristics of deep microscopic dipole traps. The dipole trap is loaded from a low density magneto optical trap (MOT) containing $\approx 5\times 10^{6}$ atoms. We determine the loading parameters that maximize the trapped atom number for a trap of waist 5 μm with trap depths ranging from 3.5 mK to 10 mK. We determine the optimal trap loading conditions and the loading rates, loss coefficients and temperature of the trapped atoms under these conditions. We show that it is possible to load a few hundred to thousand atoms in dipole traps of depth 3.5 mK to 8.5 mK under the optimal loading conditions.

arXiv:1009.2544Sep 14, 20100 citations

Dipolar atomic spin ensembles in a double-well potential

A. de Paz, B. Naylor, J. H. Huckans +6 more

We experimentally study the spin dynamics of mesoscopic ensembles of ultracold magnetic spin-3 atoms located in two separated wells of an optical dipole trap. We use a radio-frequency sweep to selectively flip the spin of the atoms in one of the wells, which produces two separated spin domains of opposite polarization. We observe that these engineered spin domains are metastable with respect to the long-range magnetic dipolar interactions between the two ensembles. The absence of intercloud dipolar spin-exchange processes reveals a classical behavior, in contrast to previous results with atoms loaded in an optical lattice. When we merge the two subsystems, we observe spin-exchange dynamics due to contact interactions which enable the determination of the $s$ -wave scattering length of $^{52}\mathrm{Cr}$ atoms in the $S=0$ molecular channel ${a}_{0}=13.{5}_{\ensuremath{-}10.5}^{+11}{a}_{B}$ (where ${a}_{B}$ is the Bohr radius).We experimentally study the spin dynamics of mesoscopic ensembles of ultracold magnetic spin-3 atoms located in two separated wells of an optical dipole trap. We use a radio-frequency sweep to selectively flip the spin of the atoms in one of the wells, which produces two separated spin domains of opposite polarization. We observe that these engineered spin domains are metastable with respect to the long-range magnetic dipolar interactions between the two ensembles. The absence of intercloud dipolar spin-exchange processes reveals a classical behavior, in contrast to previous results with atoms loaded in an optical lattice. When we merge the two subsystems, we observe spin-exchange dynamics due to contact interactions which enable the determination of the $s$-wave scattering length of $^{52}\mathrm{Cr}$ atoms in the $S=0$ molecular channel ${a}_{0}=13.{5}_{\ensuremath{-}10.5}^{+11}{a}_{B}$ (where ${a}_{B}$ is the Bohr radius).

arXiv:1407.8130Physical Review AOct 8, 201416 citations

Manipulating individual atoms in microscopic dipole traps

Georges Raymond, S. Bergamini, Antoine Browaeys +2 more

Jan 1, 20030 citations

Fast Ground State Manipulation of Neutral Atoms in Microscopic Dipole Traps

Deniz D. Yavuz, Erich Urban, Todd A. Johnson +6 more

Bulletin of the American Physical SocietyMay 17, 20060 citations

We report on an investigation of loading characteristics of deep microscopic dipole traps. The dipole trap is loaded from a low density magneto optical trap (MOT) containing

\approx 5\times 10^{6}

atoms. We determine the loading parameters that maximize the trapped atom number for a trap of waist 5 μm with trap depths ranging from 3.5 mK to 10 mK. We determine the optimal trap loading conditions and the loading rates, loss coefficients and temperature of the trapped atoms under these conditions. We show that it is possible to load a few hundred to thousand atoms in dipole traps of depth 3.5 mK to 8.5 mK under the optimal loading conditions.

s

-wave scattering length of

^{52}\mathrm{Cr}

atoms in the

S=0

molecular channel ${a}_{0}=13.{5}_{\ensuremath{-}10.5}^{+11}{a}_{B}$ (where

{a}_{B}

is the Bohr radius).