Andrew Ludlow
(NIST)
22/02/2016 09:30
Invited talk
We describe the design and operation of an optical lattice clock based on ytterbium. Exploiting a combination of narrowline laser cooling on the 1S0-3P1 transition and quenched sideband cooling on the 1S0-3P0 clock transition, we realize lattice-trapped ytterbium with temperatures <=1 uK. By using large atom number ensembles to reduce quantum projection fluctuation in atomic state...
Dr
Tetsuya Ido
(National Institute of Information and Communications Technology)
22/02/2016 10:00
Invited talk
With a reference to a $^{87}$Sr lattice clock, we demonstrated a frequency evaluation of a hydrogen maser (HM) over a few months. The HM is a part of the Japan Standard Time (JST) system and is linked to the International Atomic Time (TAI). Therefore, the result obtained over a few months has enabled an accurate TAI-based frequency measurement with the smallest uncertainty [1]. This...
Marianna Safronova
(University of Delaware)
22/02/2016 10:30
Invited talk
I will report recent advances in the calculations of atomic properties of group II atoms and similar systems of interest to the development of optical atomic clocks, production of ultracold molecules, quantum information, and precision measurements. The calculations include magic wavelengths and blackbody radiation shifts for Mg, Cd, Zn, Sr, Yb and Hg, magic-zero wavelengths in Sr,...
Eva Bookjans
(Observatoire de Paris),
Grégoire Vallet
(LNE-SYRTE, Observatoire de Paris),
Jérôme Lodewyck
(LNE-SYRTE, Observatoire de Paris), M.
Rodolphe Le Targat
(LNE-SYRTE), M.
Slawomir Bilicki
(LNE-SYRTE, Observatoire de Paris)
22/02/2016 11:20
Invited talk
We report progress towards practical optical frequency standards by demonstrating that an OLC using strontium atoms, with an accuracy of 4.1×10^-17 can be reliably operated over time periods of several weeks, with a time coverage larger than 80%, which can be considered as nearly continuous, given the stability of local oscillators. We take advantage of these long integration times to compare...
Luigi De-Sarlo
22/02/2016 11:40
Invited talk
Neutral mercury is a promising candidate to build an optical lattice clock thanks to several favorable atomic properties. Its high vapor pressure at room temperature suppresses the need for an oven and thus reduces temperature gradients on the experimental setup. Furthermore, the $^1S_0 - \phantom{}^3P_0$ ultranarrow clock transition is very weakly coupled to static and thermal radiation...
Dr
André P. Kulosa
(Institut für Quantenoptik, Leibniz Universität Hannover)
22/02/2016 12:00
Invited talk
Among the alkaline earth(-like) elements, magnesium is considered to be an ideal candidate for optical lattice clocks: it features a very large transition $Q$-factor [1] and a naturally low sensitivity to blackbody radiation at the same time [2]. Moreover, as a consequence of its low mass and simple atomic structure, atomic models can be implemented with higher precision in Mg, than for Sr or...
Dr
Matthew Dietrich
(Argonne National Laboratory)
22/02/2016 12:30
Invited talk
Laser cooling and trapping techniques have long been used for precision tests of physics, but never before have they been used to measure the electric dipole moment (EDM) of an atomic species. Such an EDM would violate time-reversal, parity, and charge-parity (CP) symmetries, which makes them a sensitive probe of expected physics beyond the Standard Model. However, to date, no such EDM has...
