High-resolution spectroscopy on trapped molecular ions in rotating electric fields: A new approach for measuring the electron electric dipole moment |
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| Authors: | AE Leanhardt JL Bohn H Loh P Maletinsky ER Meyer LC Sinclair RP Stutz EA Cornell |
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| Institution: | aJILA, National Institute of Standards and Technology and University of Colorado, Boulder, CO 80309-0440, USA;bDepartment of Physics, University of Colorado, Boulder, CO 80309-0440, USA;cDepartment of Physics, University of Michigan, Ann Arbor, MI 48109-1040, USA;dPhysics Department, Harvard University, Cambridge, MA 02138, USA |
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| Abstract: | High-resolution molecular spectroscopy is a sensitive probe for violations of fundamental symmetries. Symmetry violation searches often require, or are enhanced by, the application of an electric field to the system under investigation. This typically precludes the study of molecular ions due to their inherent acceleration under these conditions. Circumventing this problem would be of great benefit to the high-resolution molecular spectroscopy community since ions allow for simple trapping and long interrogation times, two desirable qualities for precision measurements. Our proposed solution is to apply an electric field that rotates at radio frequencies. We discuss considerations for experimental design as well as challenges in performing precision spectroscopic measurements in rapidly time-varying electric fields. Ongoing molecular spectroscopy work that could benefit from our approach is summarized. In particular, we detail how spectroscopy on a trapped diatomic molecular ion with a ground or metastable 3Δ1 level could prove to be a sensitive probe for a permanent electron electric dipole moment (eEDM). |
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| Keywords: | High-resolution spectroscopy Radio-frequency Fundamental symmetries Stark and Zeeman interactions Molecular ions |
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