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

Physical Review Letters

Sub-Kilohertz Optical Spectroscopy with a Time Domain Atom Interferometer

F. Ruschewitz, Jin-Long Peng, H. Hinderthür, N. Schaffrath, K. Sengstock, Wolfgang A. Ertmer

Published Apr 13, 1998• 77 citations
Publisher

Abstract

We report on the sub-kilohertz optical spectroscopy on the $^{1}S_{0}$- $^{3}P_{1}$ intercombination transition in magnesium at 457 nm. The spectroscopic signal is probed by a time domain atom interferometer. The realization of this time domain atom interferometer with laser cooled and trapped atoms allows extremely long interaction times and leads to resolutions down to 491 Hz (FWHM). This corresponds to a high line $Q$ factor of $1.3\ifmmode\times\else\texttimes\fi{}{10}^{12}$. Because of the high accuracy in the determination of the line center, applications with respect to an optical frequency standard are possible.

DOI
10.1103/physrevlett.80.3173

Related papers

Sub-kilohertz optical spectroscopy by time domain atom interferometry

K. Sengstock, F. Ruschewitz, Jin-Long Peng +3 more

Summary form only given, as follows. A time domain atom interferometer is used to compare the frequency of the Mg intercombination transition at 457 nm with an optical oscillator with sub-kHz resolution. An estimated accuracy of 2·10/sup -15/ is achieved with laser cooled and trapped atoms. The resolved line Q-factor is better than 10/sup 12/.

Conference on Precision Electromagnetic Measurements•Nov 27, 2002•0 citations

Precision spectroscopy of Mg atoms in a magneto-optical trap

Andrei Goncharov, A E Bonert, Denis V. Brazhnikov +2 more

We report the results of experimental investigations aimed at creation of the optical frequency standard based on magnesium atoms cooled and localised in a magneto-optical trap (MOT). An experimentally realised MOT for magnesium made it possible to obtain a cloud comprising atoms at a temperature of . The results of ultra-high resolution spectroscopy of intercombination transition for Mg atom are presented, the resonances in time-domain separated optical fields with the half-width of are recorded, which corresponds to the -factor of the reference line .

Quantum Electronics•Jun 30, 2014•15 citations

An optical frequency standard based on ultracold magnesium atoms

Andrei Goncharov, A E Bonert, Denis V. Brazhnikov +5 more

This paper presents the recent experimental results on development of an optical frequency standard based on ultra cold magnesium atoms with relative frequency uncertainty and long term stability at the level of Δ v/v <10 −16 . We stabilized the frequency of our clock laser system at 655 THz to narrow Ramsey fringes in a time separated laser fields interacting with cooled Mg atoms localized in a magneto-optical trap (MOT). The intercombination line 1 S 0 → 3 P 1 was used as the reference for frequency stabilization. The results of stabilization were studied with femtosecond comb based on Ti:Sa laser.

Journal of Physics Conference Series•Jan 1, 2017•3 citations

Ultracold Magnesium

Ernst Maria Rasel

We report on progress of generating ultracold atoms of magnesium. Magnesium belongs to the few elements suited for a neutral atom optical frequency standard. Its unique properties such as a very low black body radiation shift, the occurrence of fermionic and bosonic isotopes of suitable abundance, and the existence of a magic wavelength make it a very attractive candidate for future optical clocks. With our experiment, we determined for the first time the absolute frequency of the intercombination transition 31S0? 33P1of24Mg with a Ramsey-Bord Enterferometer, which was linked to a primary Cs Frequency standard of the PTB via a fiber femtosecond laser. Cooling ensembles of magnesium in the non-magnetic ground state to microkelvins is difficult as standard sub-Doppler cooling schemes are not applicable. We investigate novel methods to lower the temperatures of magnesium atoms. One promising method is based on a coherent two photon-process which provides higher velocity selectivity. Alternatively, standard sub-Doppler cooling schemes are applicable to the long-lived excited state, which in addition can be confined in magnetic traps. Article not available.

Quantum-Atom Optics Downunder (QAO)•Jan 1, 2007•0 citations

Doppler spectroscopy of an ytterbium Bose-Einstein condensate on the clock transition

Alexandre Dareau, Matthias Scholl, Quentin Beaufils +3 more

We describe Doppler spectroscopy of Bose-Einstein condensates of ytterbium atoms using a narrow optical transition. We address the optical clock transition around 578 nm between the ${}^{1}{S}_{0}$ and the ${}^{3}{P}_{0}$ states with a laser system locked on a high-finesse cavity. We show how the absolute frequency of the cavity modes can be determined within a few tens of kilohertz using high-resolution spectroscopy on molecular iodine. We show that optical spectra reflect the velocity distribution of expanding condensates in free fall or after release inside an optical waveguide. We demonstrate subkilohertz spectral linewidths, with long-term drifts of the resonance frequency well below 1 kHz/h. These results open the way to high-resolution spectroscopy of many-body systems.

arXiv:1412.5751•Physical Review A•Feb 24, 2015•19 citations

Room-temperature magnesium vapor cell for spectroscopy on the1S 0 -3P 1 intercombination line

A E Bonert, Vladimir Baraulya, Alexander M. Shilov +1 more

A new type of compact magnesium cell with room-temperature walls have been developed for high resolution spectroscopy on the Mg 1S0-3P1 intercombination line. Saturation resonances with a FWHM of 1.3.MHz have been detected in this cell in the fluorescence signal. The time selection method was applied to eliminate the background signal caused by the scattering of laser beams on cell windows. The signal-to-background ratio drastically increased by the spatial localization of excited atoms owing to collisions with atoms of a low-pressure inert gas.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jun 15, 2007•0 citations
We report on the sub-kilohertz optical spectroscopy on the 1S0^{1}S_{0}1S0​- 3P1^{3}P_{1}3P1​ intercombination transition in magnesium at 457 nm. The spectroscopic signal is probed by a time domain atom interferometer. The realization of this time domain atom interferometer with laser cooled and trapped atoms allows extremely long interaction times and leads to resolutions down to 491 Hz (FWHM). This corresponds to a high line QQQ factor of 1.3\ifmmode×\else\texttimes\fi10121.3\ifmmode\times\else\texttimes\fi{}{10}^{12}1.3\ifmmode×\else\texttimes\fi1012. Because of the high accuracy in the determination of the line center, applications with respect to an optical frequency standard are possible.
We report the results of experimental investigations aimed at creation of the optical frequency standard based on magnesium atoms cooled and localised in a magneto-optical trap (MOT). An experimentally realised MOT for magnesium made it possible to obtain a cloud comprising atoms at a temperature of . The results of ultra-high resolution spectroscopy of intercombination transition for Mg atom are presented, the resonances in time-domain separated optical fields with the half-width of are recorded, which corresponds to the -factor of the reference line .
This paper presents the recent experimental results on development of an optical frequency standard based on ultra cold magnesium atoms with relative frequency uncertainty and long term stability at the level of Δ v/v <10 −16 . We stabilized the frequency of our clock laser system at 655 THz to narrow Ramsey fringes in a time separated laser fields interacting with cooled Mg atoms localized in a magneto-optical trap (MOT). The intercombination line 1 S 0 → 3 P 1 was used as the reference for frequency stabilization. The results of stabilization were studied with femtosecond comb based on Ti:Sa laser.
We report on progress of generating ultracold atoms of magnesium. Magnesium belongs to the few elements suited for a neutral atom optical frequency standard. Its unique properties such as a very low black body radiation shift, the occurrence of fermionic and bosonic isotopes of suitable abundance, and the existence of a magic wavelength make it a very attractive candidate for future optical clocks. With our experiment, we determined for the first time the absolute frequency of the intercombination transition 31S0? 33P1of24Mg with a Ramsey-Bord Enterferometer, which was linked to a primary Cs Frequency standard of the PTB via a fiber femtosecond laser. Cooling ensembles of magnesium in the non-magnetic ground state to microkelvins is difficult as standard sub-Doppler cooling schemes are not applicable. We investigate novel methods to lower the temperatures of magnesium atoms. One promising method is based on a coherent two photon-process which provides higher velocity selectivity. Alternatively, standard sub-Doppler cooling schemes are applicable to the long-lived excited state, which in addition can be confined in magnetic traps. Article not available.
We describe Doppler spectroscopy of Bose-Einstein condensates of ytterbium atoms using a narrow optical transition. We address the optical clock transition around 578 nm between the 1S0{}^{1}{S}_{0}1S0​ and the 3P0{}^{3}{P}_{0}3P0​ states with a laser system locked on a high-finesse cavity. We show how the absolute frequency of the cavity modes can be determined within a few tens of kilohertz using high-resolution spectroscopy on molecular iodine. We show that optical spectra reflect the velocity distribution of expanding condensates in free fall or after release inside an optical waveguide. We demonstrate subkilohertz spectral linewidths, with long-term drifts of the resonance frequency well below 1 kHz/h. These results open the way to high-resolution spectroscopy of many-body systems.
A new type of compact magnesium cell with room-temperature walls have been developed for high resolution spectroscopy on the Mg 1S0-3P1 intercombination line. Saturation resonances with a FWHM of 1.3.MHz have been detected in this cell in the fluorescence signal. The time selection method was applied to eliminate the background signal caused by the scattering of laser beams on cell windows. The signal-to-background ratio drastically increased by the spatial localization of excited atoms owing to collisions with atoms of a low-pressure inert gas.