Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session X03: Atomic and Molecular Structure and Spectroscopy II
8:00 AM,
Friday, June 7, 2024
Room: 201A
Chair: Spencer Walker, Department of Physics, The Ohio State University
Abstract: X03.00002 : Development of optical atomic clocks based on neutral titanium atoms*
8:12 AM–8:24 AM
Presenter:
Dmytro Filin
(University of Delaware)
Authors:
Dmytro Filin
(University of Delaware)
Scott Eustice
(University of California, Berkeley)
Sergey G Porsev
(University of Delaware)
Jackson Schrott
(University of California, Berkeley)
Charles Cheung
(University of Delaware)
Diego Novoa
(University of California, Berkeley)
Dan M Stamper-Kurn
(University of California, Berkeley)
Marianna Safronova
(U Delaware)
We propose the use of ultra-narrow optical transitions in atomic titanium (Ti) as the basis of a telecommunications-band atomic clock. We found several transitions between the 3d24s2 a 3F and 3d3(4F )4s a 3F fine structure manifolds in Ti with transition wavelengths between 1483 and 1610 nm and that can serve as optical clock references for ultrastable telecommunication-band light sources.
From a numerical calculation of the Ti level structure, we identify a few key features that make Ti an attractive atom for clock applications: the extreme narrowness of the candidate clock transitions, a weak clock sensitivity to blackbody radiation shifts, and the existence of several magic wavelengths for optical trapping. All relevant properties were calculating using a high-precision relativistic hybrid method that combines configuration interaction (CI) and coupled cluster (CC) approaches. To identify magic wavelengths, we have completed the largest-to-date direct dynamical polarizability calculations.
The atomic titanium, as a transition-metal element, can be laser-cooled on near-cycling optical transitions, allowing for the adoption of optical lattice or tweezer trapping techniques used in today’s leading neutral-atom clocks. To enable implementation of the optical tweezers system, we have computed the dynamic polarizabilities for 3d2(3F )4s4p(3Po) z5Go6 and 3d3(4F )4p y5Go6 states of a neutral titanium atom at a laser wavelength of 750 nm.
*This material is based upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Systems Accelerator. Additional support is acknowledged from the ONR (Grant Nos. N00014-20-1-2513 and N00014-22-1-2280), NSF (PHY-2012068 and the QLCI program through Grant No. OMA-2016245), and ERC under the European Union's Horizon 2020 research and innovation program (Grant No.856415).
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