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 Precision Electromagnetic Measurements

Improved Optical Frequency Standard with Ultracold Calcium Atoms

Uwe Sterr, C. Degenhardt, Christian Lisdat, Hardo Stoehr, Tatiana Nazarova, F. Riehle

Published Jun 1, 2004• 0 citations
Publisher

Abstract

We report on latest improvements in an optical frequency standard based on ultracold calcium atoms. First steps towards a clock using atoms trapped in an optical lattice are presented
DOI
10.1109/cpem.2004.305591

Related papers

Optical clock with lattice-confined Sr atoms

Jun Ye

We will discuss the latest development of an accurate optical atomic clock using ultracold Sr atoms confined in a magic wavelength optical lattice, focusing on the progress in the control of collisional frequency shift.

Frontiers in Optics•Jan 1, 2010•0 citations

An optical frequency standard with ultracold calcium atoms

C. Degenhardt, Hardo Stoehr, H. Schnatz +4 more

We report a frequency measurement of the 4s2 1S0-4s4p 3P1 transition in calcium performed for the first time with ultracold atoms. The density dependence of the transition frequency was determined and a dipole trap realized.

Conference on Lasers and Electro-Optics•Jan 1, 2004•1 citation

Optical frequency standard based on a two-photon transition in calcium

Amar C. Vutha

A two-photon transition in laser-cooled and trapped calcium atoms is proposed as the atomic reference in an optical frequency standard. An efficient scheme for interrogation of the frequency standard is described, and the sensitivity of the clock transition to systematic effects is estimated. Frequency standards based on this transition could lead to compact and portable devices that are capable of rapidly averaging down to $< 10^{-16}$.

arXiv:1501.01733•Jan 8, 2015•0 citations

An improved optical clock with ultracold calcium atoms

Tatiana Nazarova, C. Degenhardt, Christian Lisdat +3 more

Conference on Lasers and Electro-Optics•Jan 1, 2005•0 citations

An optical frequency standard with ultracold calcium atoms

Sterr, Degenhardt, Stoehr +3 more

European Frequency and Time Forum•Jan 1, 2004•0 citations

Improvements to a Strontium Optical Lattice Clock

Rees L. McNally

In 2013, for the first time ever, a many-atom optical lattice clock surpassed single ion clocks as the most stable, and accurate frequency standard in existence. Since this first result, continued improvements to the clock's accuracy and stability have been made. This work will focus on two of these major improvements. Firstly the frequency uncertainty was brought down to 2.5*10^-18, thanks in part to an accurate determination of the black body radiation shift, based on better characterization of the level structure of 87Sr. Secondly, a control modification will be demonstrated which provides 20% reduction in the standard deviation for the clock's frequency under differential measurement schemes. This represents a new record for clock accuracy, pushing performance towards the 10^-19 level.

•Jan 1, 2014•0 citations
A two-photon transition in laser-cooled and trapped calcium atoms is proposed as the atomic reference in an optical frequency standard. An efficient scheme for interrogation of the frequency standard is described, and the sensitivity of the clock transition to systematic effects is estimated. Frequency standards based on this transition could lead to compact and portable devices that are capable of rapidly averaging down to <10−16< 10^{-16}<10−16.
In 2013, for the first time ever, a many-atom optical lattice clock surpassed single ion clocks as the most stable, and accurate frequency standard in existence. Since this first result, continued improvements to the clock's accuracy and stability have been made. This work will focus on two of these major improvements. Firstly the frequency uncertainty was brought down to 2.5*10^-18, thanks in part to an accurate determination of the black body radiation shift, based on better characterization of the level structure of 87Sr. Secondly, a control modification will be demonstrated which provides 20% reduction in the standard deviation for the clock's frequency under differential measurement schemes. This represents a new record for clock accuracy, pushing performance towards the 10^-19 level.