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

Abstract

Molecular overtone transitions provide optical frequency transitions sensitive to variation in the proton-to-electron mass ratio ($\mu \equiv m_p/m_e$). 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 $\mu$ attainable using TeH${}^{+}$. We find that laser cooling of TeH${}^{+}$ can lead to significant improvements on current $\mu$ variation limits.

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Cited by in corpus (6)

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• Dipole-phonon quantum logic with trapped polar molecular ions
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