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

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)

Towards a compact cold atom frequency standard based on coherent population trapping

François-Xavier Esnault, Elizabeth A. Donley, John E. Kitching

Published Jun 1, 2010• 3 citations
Publisher

Abstract

We describe the main features of a cold atom frequency standard based on coherent population trapping (CPT). We explain our particular CPT configuration and our experimental setup, and present simulations of the expected performance (stability and major systematics).
DOI
10.1109/freq.2010.5556285

Related papers

Status of a compact cold-atom CPT frequency standard

François-Xavier Esnault, Elizabeth A. Donley, John E. Kitching +1 more

We describe the progress towards the realization of a cold-atom frequency standard based on coherent population trapping (CPT). We explain our particular CPT configuration and give details on the experimental setup.

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•May 1, 2011•1 citation

A compact cold-atom frequency standard based on coherent population trapping

François-Xavier Esnault, John E. Kitching, Elizabeth A. Donley

We present the status of our cold-atom clock based on coherent population trapping, including the present clock stability and a preliminary evaluation of the three main systematic frequency shifts: the 1st-order Doppler shift, the Zeeman shift, and the light shift.

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•May 1, 2012•2 citations

A compact setup for double-modulation coherent population trapping clock

Peter Yun, François Tricot, David Holleville +2 more

We demonstrate an atomic clock based on double-modulation CPT. With a high contrast CPT signal observed in this scheme, we get a preliminary result of the frequency stability: 4×10-13 at 1 second. It shows the possibility to implement an atomic clock with a compact and robust setup while still maintaining its high performance.

European Frequency and Time Forum•Apr 1, 2016•3 citations

Frequency biases in a cold-atom coherent population trapping clock

Elizabeth A. Donley, E. Blanshan, François-Xavier Esnault +1 more

A compact cold-atom clock based on coherent population trapping (CPT) has been developed. The clock typically demonstrates a short-term fractional frequency stability of 4×10−11/√τ, limited by frequency noise on the interrogation lasers. The clock interrogates a sample of 2×105atoms under free-fall with typical cycle and Ramsey periods of 50 ms and 16 ms, respectively. The largest two systematic frequency shifts that can limit the clock's long-term stability are the light shift and the Doppler shift.

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•May 1, 2014•2 citations

Cold-atom double- Λ coherent population trapping clock

François-Xavier Esnault, E. Blanshan, Eugene N. Ivanov +3 more

Miniature atomic clocks based on coherent population trapping (CPT) states in thermal atoms are an important component in many field applications, particularly where satellite frequency standards are not accessible. Cold-atom CPT clocks promise improved accuracy and stability over existing commercial technologies. Here we demonstrate a cold-atom CPT clock based on ${}^{87}$Rb using a high-contrast double-$\ensuremath{\Lambda}$ configuration. Doppler frequency shifts are explained using a simple model and canceled by interrogating the atoms with counterpropagating light beams. We realize a compact cold-atom CPT clock with a fractional frequency stability of $4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}11}{\ensuremath{\tau}}^{\ensuremath{-}1/2}$, thus demonstrating the potential of these devices. We also show that the long-term stability is currently limited by the second-order Zeeman shift to $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}12}$ at 1000 s.

Physical Review A•Oct 31, 2013•83 citations

Atomic clock using coherent population trapping in a cesium cell: frequency stability and limitations

Sinda Mejri, François Tricot, Jean-Marie Danet +3 more

Toward the next generation of compact devices, atomic clocks based on coherent population trapping (CPT) offer a very interesting alternative. We present a review of our studies on the short and mid term stability of a compact high performance atomic clock based on CPT in view of portable applications.

Journal of Physics Conference Series•Jun 1, 2016•4 citations
A compact cold-atom clock based on coherent population trapping (CPT) has been developed. The clock typically demonstrates a short-term fractional frequency stability of 4×10−11/√τ, limited by frequency noise on the interrogation lasers. The clock interrogates a sample of 2×105atoms under free-fall with typical cycle and Ramsey periods of 50 ms and 16 ms, respectively. The largest two systematic frequency shifts that can limit the clock's long-term stability are the light shift and the Doppler shift.
Miniature atomic clocks based on coherent population trapping (CPT) states in thermal atoms are an important component in many field applications, particularly where satellite frequency standards are not accessible. Cold-atom CPT clocks promise improved accuracy and stability over existing commercial technologies. Here we demonstrate a cold-atom CPT clock based on 87{}^{87}87Rb using a high-contrast double-$\ensuremath{\Lambda}$ configuration. Doppler frequency shifts are explained using a simple model and canceled by interrogating the atoms with counterpropagating light beams. We realize a compact cold-atom CPT clock with a fractional frequency stability of $4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}11}{\ensuremath{\tau}}^{\ensuremath{-}1/2}$, thus demonstrating the potential of these devices. We also show that the long-term stability is currently limited by the second-order Zeeman shift to $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}12}$ at 1000 s.