462 citations · 3.5k across the 35 of their papers we have counts for
16 papers · 1 filter
A new experiment to test parity symmetry in cold chiral molecules using vibrational spectroscopy
A Cournol, M. Manceau, M. Pierens +21
We present a brief review of our progress towards measuring parity violation in heavy-metal chiral complexes using mid-infrared Ramsey interferometry. We discuss our progress addre…
First international comparison of fountain primary frequency standards via a long distance optical fiber link
J. Guéna, S. Weyers, M. Abgrall +25
We report on the first comparison of distant caesium fountain primary frequency standards (PFSs) via an optical fiber link. The 1415 km long optical link connects two PFSs at LNE-S…
Optical to microwave clock frequency ratios with a nearly continuous strontium optical lattice clock
Jérôme Lodewyck, Sławomir Bilicki, Eva Bookjans +10
Optical lattice clocks are at the forefront of frequency metrology. Both the instability and systematic uncertainty of these clocks have been reported to be two orders of magnitude…
Comparing a mercury optical lattice clock with microwave and optical frequency standards
R Tyumenev, M Favier, S Bilicki +9
In this paper we report the evaluation of an optical lattice clock based on neutral mercury down to a relative uncertainty of . Comparing this characterized fre…
A clock network for geodesy and fundamental science
C. Lisdat, G. Grosche, N. Quintin +32
Leveraging the unrivaled performance of optical clocks in applications in fundamental physics beyond the standard model, in geo-sciences, and in astronomy requires comparing the fr…
Atomic fountains and optical clocks at SYRTE: status and perspectives
M. Abgrall, B. Chupin, L. De Sarlo +9
In this article, we report on the work done with the LNE-SYRTE atomic clock ensemble during the last 10 years. We cover progress made in atomic fountains and in their application t…
Experimenting an optical second with strontium lattice clocks
R. Le Targat, L. Lorini, Y. Le Coq +17
Progress in realizing the SI second had multiple technological impacts and enabled to further constraint theoretical models in fundamental physics. Caesium microwave fountains, rea…
Mid-IR frequency measurement using an optical frequency comb and a long-distance remote frequency reference
Bruno Chanteau, Olivier Lopez, Wei Zhang +6
We have built a frequency chain which enables to measure the absolute frequency of a laser emitting in the 28-31 THz frequency range and stabilized onto a molecular absorption line…
Laser locking to the 199Hg clock transition with 5.4x10^(-15)/sqrt(tau) fractional frequency instability
J. J. McFerran, D. V. Magalhaes, C. Mandache +5
With Hg atoms confined in an optical lattice trap in the Lamb-Dicke regime, we obtain a spectral line at 265.6 nm in which the full-width at half-maximum is <15Hz. Here we lock an…
A neutral atom frequency reference in the deep UV with 10^(-15) range uncertainty
J. J. McFerran, L. Yi, S. Mejri +5
We present an assessment of the (6s^{2})1S0 -> (6s7s)3P0 clock transition frequency in 199Hg with an uncertainty reduction of nearly three orders of magnitude and demonstrate an at…
An Ultra-Stable Referenced Interrogation System in the Deep Ultraviolet for a Mercury Optical Lattice Clock
S. T. Dawkins, R. Chicireanu, M. Petersen +5
We have developed an ultra-stable source in the deep ultraviolet, suitable to fulfill the interrogation requirements of a future fully-operational lattice clock based on neutral me…
Ultra-low noise microwave generation with fiber-based optical frequency comb and application to atomic fountain clock
J. Millo, M. Abgrall, M. Lours +8
We demonstrate the use of a fiber-based femtosecond laser locked onto an ultra-stable optical cavity to generate a low-noise microwave reference signal. Comparison with both a liqu…
Accuracy Evaluation of an Optical Lattice Clock with Bosonic Atoms
Xavier Baillard, Mathilde Fouché, Rodolphe Le Targat +6
We report the first accuracy evaluation of an optical lattice clock based on the 1S0 - 3P0 transition of an alkaline earth boson, namely 88Sr atoms. This transition has been enable…
Measurement of excited-state transitions in cold calcium atoms by direct femtosecond frequency-comb spectroscopy
J. E. Stalnaker, Y. Le Coq, T. M. Fortier +3
We apply direct frequency-comb spectroscopy, in combination with precision cw spectroscopy, to measure the transition frequency in cold calc…
Kilohertz-resolution spectroscopy of cold atoms with an optical frequency comb
T. M. Fortier, Y. Le Coq, J. E. Stalnaker +4
We have performed sub-Doppler spectroscopy on the narrow intercombination line of cold calcium atoms using the amplified output of a femtosecond laser frequency comb. Injection loc…
Multi frequency evaporative cooling to BEC in a high magnetic field
V. Boyer, S. Murdoch, Y. Le Coq +3
We demonstrate a way to circumvent the interruption of evaporative cooling observed at high bias field for Rb atoms trapped in the (F=2, m=+2) ground state. Our scheme uses…