Laser cooling and trapping of neutral mercury is performed in a single-stage (1)S(0)↔(3)P(1) 3D magneto-optical trap. We give a detailed account of the atom cloud size and temperature for both bosonic ((200)Hg and (202)Hg) and fermionic ((199)Hg and (201)Hg) isotopes. The bosonic isotope temperatures are in close agreement with Doppler cooling theory, while temperatures obtained for the fermionic isotopes are lower, suggesting the presence of sub-Doppler cooling. A minimum temperature of 29±4 μK is achieved for (201)Hg.Laser cooling and trapping of neutral mercury is performed in a single-stage (1)S(0)↔(3)P(1) 3D magneto-optical trap. We give a detailed account of the atom cloud size and temperature for both bosonic ((200)Hg and (202)Hg) and fermionic ((199)Hg and (201)Hg) isotopes. The bosonic isotope temperatures are in close agreement with Doppler cooling theory, while temperatures obtained for the fermionic isotopes are lower, suggesting the presence of sub-Doppler cooling. A minimum temperature of 29±4 μK is achieved for (201)Hg.

Optics LettersSep 8, 201035 citations

Optical trapping and evaporative cooling of fermionic atoms

Kenneth M. O’Hara

Nov 1, 200019 citations

Magneto-optical trapping of mercury at high phase-space density

Quentin Lavigne, Thorsten Groh, Simon Stellmer

We present a realization of a magneto-optical trap of mercury atoms on the $^{1}S_{0}\ensuremath{\rightarrow}^{3}P_{1}$ intercombination line. We report on trapping of all stable mercury isotopes. We characterize the effect of laser detuning, laser intensity, and gradient field on the trapping performance of our system. The atom number for the most abundant isotope $^{202}\mathrm{Hg}$ is $5\ifmmode\times\else\texttimes\fi{}{10}^{7}$ atoms. Moreover, we study the difference in cooling processes for bosonic and fermionic isotopes. We observe agreement with the Doppler cooling theory for the bosonic species and show sub-Doppler cooling for the fermionic species. We reach a phase-space density of a few parts in ${10}^{\ensuremath{-}7}$, which constitutes a promising starting condition for dipole trap loading and evaporative cooling.We present a realization of a magneto-optical trap of mercury atoms on the $^{1}S_{0}\ensuremath{\rightarrow}^{3}P_{1}$ intercombination line. We report on trapping of all stable mercury isotopes. We characterize the effect of laser detuning, laser intensity, and gradient field on the trapping performance of our system. The atom number for the most abundant isotope $^{202}\mathrm{Hg}$ is $5\ifmmode\times\else\texttimes\fi{}{10}^{7}$ atoms. Moreover, we study the difference in cooling processes for bosonic and fermionic isotopes. We observe agreement with the Doppler cooling theory for the bosonic species and show sub-Doppler cooling for the fermionic species. We reach a phase-space density of a few parts in ${10}^{\ensuremath{-}7}$, which constitutes a promising starting condition for dipole trap loading and evaporative cooling.

arXiv:2112.11556Physical Review AMar 15, 202211 citations

Trapping and cooling fermionic atoms into the Mott and N\'eel states

Corinna Kollath

Bulletin of the American Physical SocietyMar 19, 20090 citations

Sub-Doppler deep-cooled bosonic and fermionic isotopes of potassium in a compact 2D+–3D MOT set-up

Vandna Gokhroo, G Rajalakshmi, Raghavan K. Easwaran +1 more

We report the sub-Doppler deep-cooled three-dimensional magneto-optical trap (3D MOT) of the fermionic 40K and bosonic 39K isotopes of potassium loaded by a very compact 2D+ MOT with a novel optical design feature. The set-up is meant for studies on the quantum dynamics of a few fermionic and bosonic atoms in an optical dipole trap near and well within quantum degeneracy. The loading rate and atom numbers achieved in the compact simple set-up are comparable to those in the previous set-ups with more elaborate vacuum design. We attained relatively low temperatures of 34 and 30 µK for 39K and 40K after the sub-Doppler cooling process.We report the sub-Doppler deep-cooled three-dimensional magneto-optical trap (3D MOT) of the fermionic 40K and bosonic 39K isotopes of potassium loaded by a very compact 2D+ MOT with a novel optical design feature. The set-up is meant for studies on the quantum dynamics of a few fermionic and bosonic atoms in an optical dipole trap near and well within quantum degeneracy. The loading rate and atom numbers achieved in the compact simple set-up are comparable to those in the previous set-ups with more elaborate vacuum design. We attained relatively low temperatures of 34 and 30 µK for 39K and 40K after the sub-Doppler cooling process.

Journal of Physics B Atomic Molecular and Optical PhysicsMay 20, 201148 citations

Cooling of fermionic

^{83}\hbox {Kr}

and bosonic

^{84}\hbox {Kr}

isotopes in a magneto-optical trap

^{202}\mathrm{Hg}

is $5\ifmmode\times\else\texttimes\fi{}{10}^{7}$ atoms. Moreover, we study the difference in cooling processes for bosonic and fermionic isotopes. We observe agreement with the Doppler cooling theory for the bosonic species and show sub-Doppler cooling for the fermionic species. We reach a phase-space density of a few parts in ${10}^{\ensuremath{-}7}$, which constitutes a promising starting condition for dipole trap loading and evaporative cooling.