Proof of principle for a high sensitivity search for the electric dipole moment of the electron using the metastable a(1)[3Σ+] state of PbO
D. Kawall, F. Bay, S. Bickman, Y. Jiang, D. DeMille
Abstract
The metastable a(1)[3Σ+] state of PbO has been suggested as a suitable system in which to search for the electric dipole moment (EDM) of the electron. We report here the development of experimental techniques allowing high-sensitivity measurements of Zeeman and Stark effects in this system, similar to those required for an EDM search. We observe Zeeman quantum beats in fluorescence from a vapor cell, with shot-noise limited extraction of the quantum beat frequencies, high counting rates, and long coherence times. We argue that improvement in sensitvity to the electron EDM by at least two orders of magnitude appears possible using these techniques.
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