Prospects for measuring the electron's electric dipole moment with polyatomic molecules in an optical lattice

Roman Bause; Nithesh Balasubramanian; Ties Fikkers; Eifion H. Prinsen; Kees Steinebach; Arian Jadbabaie; Nicholas R. Hutzler; I. Agustín Aucar; Lukáš F. Pašteka; Anastasia Borschevsky; Steven Hoekstra

doi:10.1103/8ltl-7wsb

Prospects for measuring the electron's electric dipole moment with polyatomic molecules in an optical lattice

Roman Bause ^1,2,*, Nithesh Balasubramanian ^1,2, Ties Fikkers ^1,2, Eifion H. Prinsen ^1,2, Kees Steinebach ³, Arian Jadbabaie ⁴, Nicholas R. Hutzler ⁵, I. Agustín Aucar ^1,2,6, Lukáš F. Pašteka ^1,2,7 et al.

Anastasia Borschevsky ^1,2 and Steven Hoekstra ^1,2,†

¹Van Swinderen Institute for Particle Physics and Gravity, University of Groningen, The Netherlands
²Nikhef, National Institute for Subatomic Physics, Amsterdam, The Netherlands
³LaserLaB, Vrije Universiteit Amsterdam, The Netherlands
⁴Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
⁵Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
⁶Instituto de Modelado e Innovación Tecnológica (UNNE-CONICET), Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Corrientes, Argentina
⁷Department of Physical and Theoretical Chemistry, Comenius University, Bratislava, Slovakia

^*Present address: Menlo Systems GmbH, 82152 Martinsried, Germany.
^†Contact author: s.hoekstra@rug.nl

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Phys. Rev. A 111, 062815 – Published 17 June, 2025

DOI: https://doi.org/10.1103/8ltl-7wsb

Abstract

We present the conceptual design of an experiment to measure the electron's electric dipole moment (eEDM) using ${}^{138}{BaOH}$ molecules in an optical lattice. The BaOH molecule is laser-coolable and highly sensitive to the eEDM, making it an attractive candidate for such a precision measurement, and capturing it in an optical lattice offers potentially very long coherence times. We study possibilities and limitations of this approach, identify the most crucial limiting factors and ways to overcome them. The proposed apparatus can reach a statistical error of $10^{- 30} e cm$ by measuring spin precession on a total number of $5 \times 10^{9}$ molecules over a span of 120 days.

Physical Review A

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Prospects for measuring the electron's electric dipole moment with polyatomic molecules in an optical lattice

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Prospects for measuring the electron's electric dipole moment with polyatomic molecules in an optical lattice

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