Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session H02: Sensing, metrology, and communication with lightInvited Live
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Chair: Shimon Kolkowitz, Wisconsin |
Wednesday, June 2, 2021 8:00AM - 8:30AM Live |
H02.00001: Isotope Shifts and Dark Matter Searches with Trapped Atomic Ions Invited Speaker: S. Charles C Doret Atomic & molecular spectroscopy and the interplay between theory and experiment has long played a central role in the development of new theories for fundamental physics. Landmark experiments, such as measurments of parity violation and limits on the electron electric dipole moment, have combined with ever-improving theory to set limits on ``new" physics which complement collider experiments. Many of the today's most stringent limits on possible extensions to the Standard Model arise from AMO experiments. |
Wednesday, June 2, 2021 8:30AM - 9:00AM Live |
H02.00002: Bounds to the coupling of bosons beyond the Standard Model to atoms through precise isotope shift measurements Invited Speaker: Michael Drewsen By combining high-resolution spectroscopy of the 3d 2D3/2 − 3d 2D5/2 interval with an accuracy of ∼20 Hz using direct frequency-comb Raman spectroscopy with isotope shift measurements of the 4s 2S1/2 ↔ 3d 2D5/2 transition (~2 kHz accuracy) in all stable even isotopes of ACa+ (A = 40, 42, 44, 46, and 48), we have been able to carry out a King plot analysis with unprecedented sensitivity to coupling between electrons and neutrons by bosons beyond the Standard Model. We estimate, furthermore, that by improved spectroscopic techniques available, King plots based on data from spectroscopy on either Ca+, Ba+ and Yb+ ions should be able to produce sensitivity to such potentially new bosons, which surpass all other current methods in a broad mass range of 10 to 108 eV/c2. |
Wednesday, June 2, 2021 9:00AM - 9:30AM Live |
H02.00003: Search for new physics using isotope-shift spectroscopy with trapped ions Invited Speaker: Joonseok Hur Historically, precise atomic spectroscopy has led to new physics in many instances. Precision low-energy experiments may thus supplement high-energy and astrophysical approaches. It has been proposed to measure the isotope shifts in ions to probe new physics using King plots [1-3]. A King plot maps isotope shifts as points in a two-dimensional graph [4]. The Standard Model (SM) predicts in the leading order that the points in King plots should lie on a straight line if the atoms have no nuclear spin. Our recent experiment with two narrow S → D transitions in trapped Yb+ ions showed evidence for departure from the predicted linearity [5]. However, the contribution of higher-order corrections to the non-linearity within the SM complicates the test. The sources of the observed violation should be examined carefully to decouple the SM corrections arising from nuclear physics from possible new-physics contributions. |
Wednesday, June 2, 2021 9:30AM - 10:00AM Live |
H02.00004: Operation of atomic-clock transitions by twisted light modes Invited Speaker: Andrey Surzhykov During the last decade, a considerable interest has been paid to the production and application of twisted (or vortex) light beams. These structured beams, that possess a helical phase front and also carry orbital angular momentum (OAM), were found to be a valuable tool for a great variety of studies in atomic, molecular and optical physics. Of particular interest here is interrogation of trapped atoms and ions with vortex light. The use of OAM light allows significant suppression of the AC-Stark shift of transition frequencies if an atom is located near the center of photon beam. Together with the efficient excitation of higher-multipole (dipole-forbidden) channels, this cancellation of the AC-Stark shift makes twisted light promising for studying and employing atomic clock transitions. In this contribution we will discuss recent experimental and theoretical advances in spectroscopy of the clock transitions with the help of OAM light beams [1]. Special attention will be placed the $^2S_{1/2} (F = 0) \to {}^2F_{7/2}(F =3 M_F = 0)$ electric octupole (E3) transition in a single trapped ${}^{171}Yb^{+}$ ion, which attracts currently much attention as a candidate for a novel frequency standard. We will show how the topological charge and polarization of incident twisted light can be used to control this transition and will discuss the potential of development of ``OAM-based atomic clocks’’. |
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