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Iritani B, Tiberi E, Skomorowski W, Moszynski R, Borkowski M, Zelevinsky T. Accurate Determination of Blackbody Radiation Shifts in a Strontium Molecular Lattice Clock. PHYSICAL REVIEW LETTERS 2023; 131:263201. [PMID: 38215384 DOI: 10.1103/physrevlett.131.263201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 11/20/2023] [Indexed: 01/14/2024]
Abstract
Molecular lattice clocks enable the search for new physics, such as fifth forces or temporal variations of fundamental constants, in a manner complementary to atomic clocks. Blackbody radiation (BBR) is a major contributor to the systematic error budget of conventional atomic clocks and is notoriously difficult to characterize and control. Here, we combine infrared Stark-shift spectroscopy in a molecular lattice clock and modern quantum chemistry methods to characterize the polarizabilities of the Sr_{2} molecule from dc to infrared. Using this description, we determine the static and dynamic blackbody radiation shifts for all possible vibrational clock transitions to the 10^{-16} level. This constitutes an important step toward millihertz-level molecular spectroscopy in Sr_{2} and provides a framework for evaluating BBR shifts in other homonuclear molecules.
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Affiliation(s)
- B Iritani
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - E Tiberi
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - W Skomorowski
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland
| | - R Moszynski
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - M Borkowski
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
| | - T Zelevinsky
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
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