Engineering field-insensitive molecular clock transitions for symmetry violation searches

Abstract

Molecules are a powerful platform to probe fundamental symmetry violations beyond the Standard Model, as they offer both large amplification factors and robustness against systematic errors. As experimental sensitivities improve, it is important to develop new methods to suppress sensitivity to external electromagnetic fields, as limits on the ability to control these fields are a major experimental concern. Here we show that sensitivity to both external magnetic and electric fields can be simultaneously suppressed using engineered radio frequency, microwave, or two-photon transitions that maintain large amplification of CP-violating effects. By performing a clock measurement on these transitions, CP-violating observables including the electron electric dipole moment, nuclear Schiff moment, and magnetic quadrupole moment can be measured with suppression of external field sensitivity of $\gtrsim$100 generically, and even more in many cases. Furthermore, the method is compatible with traditional Ramsey measurements, offers internal co-magnetometry, and is useful for systems with large angular momentum commonly present in molecular searches for nuclear CP-violation.

References in corpus (10)

• Measurement of the permanent electric dipole moment of the neutron
• Precision Measurement of Time-Reversal Symmetry Violation with Laser-Cooled Polyatomic Molecules
• Time-reversal symmetry violation in molecules induced by nuclear magnetic quadrupole moments
• Rotational Coherence Times of Polar Molecules in Optical Tweezers
• Electric field-dependent dynamic polarizability and "magic" conditions for optical trapping of polar molecules
• Long-range multi-body interactions and three-body anti-blockade in a trapped Rydberg ion chain
• Observation and laser spectroscopy of ytterbium monomethoxide, YbOCH${}_3$
• Spectroscopy on the eEDM-sensitive states of ThF${}^{+}$
• Suppression of clock shifts at field-insensitive transitions
• High-resolution 'magic'-field spectroscopy on trapped polyatomic molecules

Cited by in corpus (9)

• $\mathcal{C}\mathcal{P}$-violation sensitivity of closed-shell radium-containing polyatomic molecular ions
• Low-noise environment for probing fundamental symmetries
• Production and spectroscopy of cold radioactive molecules
• Measuring the nuclear magnetic quadrupole moment of optically trapped ytterbium atoms in the metastable state
• Engineered Molecular Clock Transitions for Symmetry Violation Searches
• Ultracold high-spin $\Sigma$-state polar molecules for new physics searches
• Universality in fidelity-based quantum metrology
• Parity-Doublet Coherence Times in Optically Trapped Polyatomic Molecules
• Nuclear Electric Quadrupole Moment-Induced Parity Doubling in Molecules for Symmetry-Violation Searches