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Zeeman interaction in ThO H^3Δ_1 for the electron electric-dipole-moment search

Petrov, A. N. and Skripnikov, L. V. and Titov, A. V. and Hutzler, N. R. and Hess, P. W. and O'Leary, B. R. and Spaun, B. and DeMille, D. and Gabrielse, G. and Doyle, J. M. (2014) Zeeman interaction in ThO H^3Δ_1 for the electron electric-dipole-moment search. Physical Review A, 89 (6). Art. No. 062505. ISSN 1050-2947. https://resolver.caltech.edu/CaltechAUTHORS:20170831-111929615

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Abstract

The current limit on the electron's electric dipole moment, ∣d_e∣ < 8.7 × 10^(−29) e cm (90% confidence), was set using the molecule thorium monoxide (ThO) in the J = 1 rotational level of its H^3Δ_1 electronic state [J. Baron et al., Science 343, 269 (2014)]. This state in ThO is very robust against systematic errors related to magnetic fields or geometric phases, due in part to its Ω-doublet structure. These systematics can be further suppressed by operating the experiment under conditions where the g-factor difference between the Ω doublets is minimized. We consider the g factors of the ThO H^3Δ_1 state both experimentally and theoretically, including dependence on Ω doublets, the rotational level, and the external electric field. The calculated and measured values are in good agreement. We find that the g-factor difference between Ω doublets is smaller in J = 2 than in J = 1 and reaches zero at an experimentally accessible electric field. This means that the H,J = 2 state should be even more robust against a number of systematic errors compared to H,J = 1.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevA.89.062505DOIArticle
https://arxiv.org/abs/1404.4024arXivDiscussion Paper
ORCID:
AuthorORCID
Hutzler, N. R.0000-0002-5203-3635
Hess, P. W.0000-0003-2985-4221
Additional Information:© 2014 American Physical Society. Received 15 April 2014; published 11 June 2014. The PNPI-SPbU team acknowledges St. Petersburg State University for a research grant (Grant No. 0.38.652.2013) and the RFBR for Grant No. 13-02-01406. L.S. is also grateful to the President of RF for Grant No. 5877.2014.2. The molecular calculations were partly performed at the Supercomputer “Lomonosov.” The work of the Harvard and Yale teams was performed as part of the ACME Collaboration, to whom we are grateful for its contributions, and was supported by the NSF.
Funders:
Funding AgencyGrant Number
St. Petersburg State University0.38.652.2013
Russian Fund for Basic Research13-02-01406
RF President5877.2014.2
NSFUNSPECIFIED
Issue or Number:6
Classification Code:PACS number(s): 31.15.vn, 31.30.jp, 32.10.Dk, 33.15.Kr
Record Number:CaltechAUTHORS:20170831-111929615
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170831-111929615
Official Citation:Zeeman interaction in ThO H ^3Δ_1 for the electron electric-dipole-moment search Petrov, A. N. and Skripnikov, L. V. and Titov, A. V. and Hutzler, N. R. and Hess, P. W. and O'Leary, B. R. and Spaun, B. and DeMille, D. and Gabrielse, G. and Doyle, J. M. Phys. Rev. A, vol.89 no.6 Art. No. 062505, 2014 doi = 10.1103/PhysRevA.89.062505 https://link.aps.org/doi/10.1103/PhysRevA.89.062505
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81015
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:05 Sep 2017 18:08
Last Modified:09 Mar 2020 13:18

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