International Workshop on Ultracold Group II Atoms

Session

Session 1

Feb 22, 2016, 9:30 AM

Paris

31. Making 10^{-18} fractional frequency measurements with ytterbium optical lattice clocks

Andrew Ludlow (NIST)

2/22/16, 9:30 AM

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...

23. Intermittent operation of a lattice clock toward the realization of a time scale

Dr Tetsuya Ido (National Institute of Information and Communications Technology)

2/22/16, 10:00 AM

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...

35. Group II atoms: atomic clocks, long-range interactions, and precision measurements

Marianna Safronova (University of Delaware)

2/22/16, 10:30 AM

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,...

7. Strontium optical lattice clocks at LNE-SYRTE

Eva Bookjans (Observatoire de Paris), Grégoire Vallet (LNE-SYRTE, Observatoire de Paris), Jérôme Lodewyck (LNE-SYRTE, Observatoire de Paris), Mr Rodolphe Le Targat (LNE-SYRTE), Mr Slawomir Bilicki (LNE-SYRTE, Observatoire de Paris)

2/22/16, 11:20 AM

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...

56. Comparing a mercury optical lattice clock with microwave and optical frequency standard

Luigi De-Sarlo

2/22/16, 11:40 AM

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...

27. Element No. 12: Benefits and challenges of Mg in frequency metrology

Dr André P. Kulosa (Institut für Quantenoptik, Leibniz Universität Hannover)

2/22/16, 12:00 PM

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...

19. Searching for Physics beyond the Standard Model with Laser-Cooled Radium Atoms

Dr Matthew Dietrich (Argonne National Laboratory)

2/22/16, 12:30 PM

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...