Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session Y36: Progress and Applications of Optical ClocksInvited
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Sponsoring Units: DAMOP Chair: Dominik Schneble, Stony Brook University Room: BCEC 205C |
Friday, March 8, 2019 11:15AM - 11:51AM |
Y36.00001: Engineering Quantum States of Matter for Atomic Clocks Invited Speaker: Jun Ye Precise engineering of quantum states of matter and advanced laser technology are elevating the performance of optical atomic clocks to new levels. These increasingly powerful measurement capabilities are promising greater opportunities for probing fundamental and emerging phenomena. |
Friday, March 8, 2019 11:51AM - 12:27PM |
Y36.00002: Geodesy and metrology with a transportable optical clock Invited Speaker: Christian Lisdat The development of optical clocks that can be transported and operated outside metrology laboratories promises exciting new and competitive measurement methods for geodesy, where chronometric levelling is considered as a complementary method to measure height differences [1-4]. |
Friday, March 8, 2019 12:27PM - 1:03PM |
Y36.00003: Geopotential measurements with synchronously linked optical lattice clocks Invited Speaker: Masao Takamoto The recent progress of optical lattice clocks has improved the accuracies to 10^(-18), which outperforms the realization of the SI second. We will present the development of the optical lattice clocks and their applications in geodetic measurements. |
Friday, March 8, 2019 1:03PM - 1:39PM |
Y36.00004: Atomic clock performance beyond the geodetic limit Invited Speaker: Andrew Ludlow We present recent updates in the development of optical lattice clocks, with particular emphasis on systems using ultracold ytterbium. Over the last several years, the intersection of quantum control, optical coherence, and precision measurement has afforded substantial progress in the development of these clock systems. Measurements can now reach 10-18 precision or better, at a level capable of beyond state-of-the-art geodesy through determination of the gravitational redshift. We will highlight a variety of Yb clock measurement campaigns that have recently been carried out, including optical frequency ratio measurements with other optical clocks. These measurements are analyzed in the context of beyond-Standard-Model physics, such as fundamental constant variation and dark matter searches. Finally, we will discuss prospects for continued improvements and future measurement applications. |
Friday, March 8, 2019 1:39PM - 2:15PM |
Y36.00005: Two clock transitions in neutral Yb for the highest sensitivity to variations of the fine-structure constant Invited Speaker: Marianna Safronova We propose a new frequency standard based on a 4f14 6s6p 3P0 - 4f13 6s2 5d (J=2) transition in neutral Yb [1]. This transition has a potential for high stability and accuracy and the advantage of the highest sensitivity among atomic clocks to variation of the fine-structure constant α. We find its dimensionless α-variation enhancement factor to be K=-15, in comparison to the most sensitive current clock (Yb+ E3, K=-6), and it is 18 times larger than in any neutral-atomic clocks (Hg, K=0.8). Combined with the unprecedented stability of an optical lattice clock for neutral atoms, this high sensitivity opens new perspectives for searches for ultralight dark matter and for tests of theories beyond the standard model of elementary particles. Moreover, together with the well-established 1S0 - 3P0 transition one will have two clock transitions operating in neutral Yb, whose interleaved interrogations may further reduce systematic uncertainties of such clock-comparison experiments. |
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