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Optical telecommunications-band clock based on neutral titanium atoms

Scott Eustice1,2, Dmytro Filin3, Jackson Schrott1,2, Sergey Porsev3, Charles Cheung3, Diego Novoa1,2, Dan M. Stamper-Kurn1,2,4, and Marianna S. Safronova3,5

  • 1Department of Physics, University of California, Berkeley, California 94720, USA
  • 2Challenge Institute for Quantum Computation, University of California, Berkeley, California 94720, USA
  • 3Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
  • 4Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 5Joint Quantum Institute, National Institute of Standards and Technology and the University of Maryland, College Park, Maryland 20742, USA

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Phys. Rev. A 107, L051102 – Published 19 May, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.L051102

Abstract

We propose an optical clock based on ultranarrow transitions in neutral titanium, which exhibit small blackbody radiation and quadratic Zeeman shifts and have wavelengths in the S-, C-, and L-telecommunications fiber bands, allowing for integration with robust laser technology. We calculate relevant properties using a high-precision relativistic hybrid method that combines configuration interaction and coupled-cluster approaches. To identify magic wavelengths, we have completed the largest-to-date direct dynamical polarizability calculations. Finally, we identify challenges that arise from magnetic dipole-dipole interactions and describe an approach to overcome them. A telecommunications-band atomic frequency standard will aid the deployment of optical clock networks and clock comparisons over long distances.

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Phys. Rev. A 107, L051102– Published 19 May, 2023
  • Received 9 February 2023
  • Accepted 20 April 2023
Article part of CHORUS
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