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. Atoms2018, 6, 53.
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.
Molecular overtone transitions provide optical frequency transitions sensitive to variation in the proton-to-electron mass ratio (μ = mp/me). 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.
time variation of constants; proton-electron mass ratio; molecular ion; laser cooling
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