Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

A continuously loaded dipole trap for magnesium

André Pape, Matthias Riedmann, Hrishikesh Kelkar, J. Friebe, Temmo Wübbena, A. P. Kulosa, Steffen Rühmann, Klaus Zipfel, Dominika Fim, Birte Lampmann, Wolfgang A. Ertmer, Ernst Maria Rasel

Published May 1, 2011• 0 citations
Publisher

Abstract

The authors report on the successful loading of an optical dipole trap at 1064 nm a prerequisite for a future Mg optical lattice clock operated on the strictly forbidden1S0-3P0transition. The authors reached trapping of about 105Mg-24 atoms in the3P0state.
DOI
10.1109/cleoe.2011.5943306

Related papers

Towards a magnesium optical lattice clock

Steffen Rühmann, Matthias Riedmann, Temmo Wübbena +9 more

The authors report on the recent progress in setting up a magic wavelength optical lattice for magnesium. At the magic wavelength for the1S0→3P0transition of Mg, which has been predicted to be at 463 nm, the differential AC Stark shift of the intercombination transition cancels out. Currently, the authors investigate to establish the optical lattice inside an optical resonator to enhance the trap depth and the loading of this lattice. Furthermore, the tight confinement of the atoms in the lattice will enable us to reach the Lamb-Dicke regime, allowing first order Doppler-free spectroscopy.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•May 1, 2011•2 citations

Beating the density limit by continuously loading a dipole trap from millikelvin-hot magnesium atoms

Matthias Riedmann, Hrishikesh Kelkar, Temmo Wübbena +8 more

We load ${10}^{5}$ magnesium atoms in a dipole trap from a millikelvin-hot magneto-optical trap (MOT) using a continuous-loading scheme. Light-assisted two-body processes limit the maximum achievable density in a MOT, resulting in a reduced transfer efficiency into a dipole trap when using the conventional sequential scheme. It is overcome in a continuous-loading scheme where a loss channel is opened in the MOT. This allows the accumulation of atoms in the dipole trap over the trap lifetime, determined by collisions with the background gas. This results in a significantly higher number of trapped atoms even at a lower steady-state peak density in the MOT.

Physical Review A•Oct 10, 2012•38 citations

Magic-intensity trapping of the Mg lattice clock with light shift suppressed below 10−19

Fang-Fei Wu, Yong-Bo Tang, Ting-Yun Shi +1 more

Progress in atomic optical clocks with total uncertainty of ${10}^{\ensuremath{-}18}$ or below requires a precise estimation of multipolar and higher-order effects due to atom-field interactions. Magnesium is an attractive candidate for optical lattice clocks because it is insensitive to blackbody radiation and has a large quality factor. We employ a combined method of the Dirac-Fock plus core polarization and the relativistic configuration interaction to calculate the dynamic multipolar polarizabilities and the hyperpolarizabilities of the atomic Mg clock. The lattice light shift against variation of the laser detuning and trap depth is also investigated. We find that there exists a distinctive operational magic lattice intensity of $5.33(2){E}_{R}$ (${E}_{R}$ is the lattice photon recoil energy) that reduces the total light shift below $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}19}$ over $14%$ of the trap depth variation, which will pave the way for the development of a new time-frequency standard of the Mg lattice clock.

arXiv:1909.07692•Physical Review A•May 7, 2020•7 citations

Towards a Mg Lattice Clock: Observation of the S01−P03 Transition and Determination of the Magic Wavelength

A. P. Kulosa, Dominika Fim, Klaus Zipfel +9 more

We optically excite the electronic state 3s3p ^{3}P_{0} in ^{24}Mg atoms, laser cooled and trapped in a magic-wavelength lattice. An applied magnetic field enhances the coupling of the light to the otherwise strictly forbidden transition. We determine the magic wavelength, the quadratic magnetic Zeeman shift, and the transition frequency to be 468.46(21) nm, -206.6(2.0) MHz/T^{2}, and 655 058 646 691(101) kHz, respectively. These are compared with theoretical predictions and results from complementary experiments. We also develop a high-precision relativistic structure model for magnesium, give an improved theoretical value for the blackbody radiation shift, and discuss a clock based on bosonic magnesium.

arXiv:1508.01118•Physical Review Letters•Dec 9, 2015•64 citations

Toward a mercury optical lattice clock: Development of a dipole lattice trap at the magic wavelength

John J. McFerran, Sinda Mejri, L. Yi +1 more

We describe our work to develop an optical lattice clock using neutral mercury, which has the potential to reach accuracy near 1 part in 1018owing to its low sensitivity to black body radiation. We describe developments of our experimental setup to allow dipole lattice trapping and spectroscopy in the Lamb-Dicke regime. Specifically, we report on the implementation of a low noise imaging and detection system, on the characterization of the magneto-optic trap from which the dipole trap will be loaded, on the implementation of the dipole lattice trap itself, a challenging task given the wavelength and power requirements.

•Jun 1, 2010•0 citations

Towards an optical lattice clock based on mercury: Loading of a dipole trap

Sinda Mejri, John J. McFerran, L. Yi +1 more

In the pursuit of developing an optical lattice clock with mercury as the quantum absorber, we describe an experiment that produces dipole lattice trapping of neutral mercury atoms. We report on the details of an optical lattice trap with light near the predicted magic wavelength and on the implementation of a low noise detection system.

European Frequency and Time Forum•Apr 1, 2010•0 citations
The authors report on the recent progress in setting up a magic wavelength optical lattice for magnesium. At the magic wavelength for the1S0→3P0transition of Mg, which has been predicted to be at 463 nm, the differential AC Stark shift of the intercombination transition cancels out. Currently, the authors investigate to establish the optical lattice inside an optical resonator to enhance the trap depth and the loading of this lattice. Furthermore, the tight confinement of the atoms in the lattice will enable us to reach the Lamb-Dicke regime, allowing first order Doppler-free spectroscopy.
We load 105{10}^{5}105 magnesium atoms in a dipole trap from a millikelvin-hot magneto-optical trap (MOT) using a continuous-loading scheme. Light-assisted two-body processes limit the maximum achievable density in a MOT, resulting in a reduced transfer efficiency into a dipole trap when using the conventional sequential scheme. It is overcome in a continuous-loading scheme where a loss channel is opened in the MOT. This allows the accumulation of atoms in the dipole trap over the trap lifetime, determined by collisions with the background gas. This results in a significantly higher number of trapped atoms even at a lower steady-state peak density in the MOT.
Progress in atomic optical clocks with total uncertainty of ${10}^{\ensuremath{-}18}$ or below requires a precise estimation of multipolar and higher-order effects due to atom-field interactions. Magnesium is an attractive candidate for optical lattice clocks because it is insensitive to blackbody radiation and has a large quality factor. We employ a combined method of the Dirac-Fock plus core polarization and the relativistic configuration interaction to calculate the dynamic multipolar polarizabilities and the hyperpolarizabilities of the atomic Mg clock. The lattice light shift against variation of the laser detuning and trap depth is also investigated. We find that there exists a distinctive operational magic lattice intensity of 5.33(2)ER5.33(2){E}_{R}5.33(2)ER​ (ER{E}_{R}ER​ is the lattice photon recoil energy) that reduces the total light shift below $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}19}$ over 1414%14 of the trap depth variation, which will pave the way for the development of a new time-frequency standard of the Mg lattice clock.
We optically excite the electronic state 3s3p ^{3}P_{0} in ^{24}Mg atoms, laser cooled and trapped in a magic-wavelength lattice. An applied magnetic field enhances the coupling of the light to the otherwise strictly forbidden transition. We determine the magic wavelength, the quadratic magnetic Zeeman shift, and the transition frequency to be 468.46(21) nm, -206.6(2.0) MHz/T^{2}, and 655 058 646 691(101) kHz, respectively. These are compared with theoretical predictions and results from complementary experiments. We also develop a high-precision relativistic structure model for magnesium, give an improved theoretical value for the blackbody radiation shift, and discuss a clock based on bosonic magnesium.
We describe our work to develop an optical lattice clock using neutral mercury, which has the potential to reach accuracy near 1 part in 1018owing to its low sensitivity to black body radiation. We describe developments of our experimental setup to allow dipole lattice trapping and spectroscopy in the Lamb-Dicke regime. Specifically, we report on the implementation of a low noise imaging and detection system, on the characterization of the magneto-optic trap from which the dipole trap will be loaded, on the implementation of the dipole lattice trap itself, a challenging task given the wavelength and power requirements.