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Open AccessArticle

Optical Pumping of TeH+: Implications for the Search for Varying mp/me

1
Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
2
Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto-SP 14040-901, Brazil
3
Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo-SP 05508-000, Brazil
*
Author to whom correspondence should be addressed.
Atoms 2018, 6(3), 53; https://doi.org/10.3390/atoms6030053
Received: 11 July 2018 / Revised: 28 August 2018 / Accepted: 7 September 2018 / Published: 17 September 2018
(This article belongs to the Special Issue High Precision Measurements of Fundamental Constants)
Molecular overtone transitions provide optical frequency transitions sensitive to variation in the proton-to-electron mass ratio ( μ m p / m e ). However, robust molecular state preparation presents a challenge critical for achieving high precision. Here, we characterize infrared and optical-frequency broadband laser cooling schemes for TeH + , a species with multiple electronic transitions amenable to sustained laser control. Using rate equations to simulate laser cooling population dynamics, we estimate the fractional sensitivity to μ attainable using TeH + . We find that laser cooling of TeH + can lead to significant improvements on current μ variation limits. View Full-Text
Keywords: time variation of constants; proton-electron mass ratio; molecular ion; laser cooling time variation of constants; proton-electron mass ratio; molecular ion; laser cooling
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MDPI and ACS Style

Stollenwerk, P.R.; Kokish, M.G.; De Oliveira-Filho, A.G.S.; Ornellas, F.R.; Odom, B.C. Optical Pumping of TeH+: Implications for the Search for Varying mp/me. Atoms 2018, 6, 53.

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