Search for CP-violating nuclear magnetic quadrupole moment using the LuOH$^+$ cation

Abstract

The CP-violating interaction of the nuclear magnetic quadrupole moment (MQM) of the 175 Lu nucleus with electrons in the molecular cation LuOH + is studied. The resulting effect is expressed in terms of CP-odd parameters, such as quantum chromodynamics angle θ, quark EDM and chromo-EDM. For this we have performed a calculation of the nuclear MQM as well as the molecular constant that characterises the interaction of this MQM of 175 Lu with electrons. Additionally, we predict the hyperfine structure constants for the ground electronic state of LuOH + . We conclude that LuOH + is a promising system to measure the nuclear MQM.

Polyatomic molecules as quantum sensors for fundamental physics

“…The bending modes in linear molecules ( −doubling) or the rotation of symmetric tops about their symmetry axis (K−doubling) considered earlier are present in laser-coolable molecules, and offer high polarizability and internal co-magnetometers. Additionally, these doublets enable precision molecular ion trap measurements [24] and therefore open up a number of interesting species which do not have the correct electronic structure to make diatomics with parity doublets, such as Lu and Ra [29,[94][95][96][97].…”

Polyatomic Molecules as Quantum Sensors for Fundamental Physics

“…This means that the parity doublets of polyatomic molecules are a useful resource, and again do not in general interfere with the electronic structure requirements for good sensitivity. NSM sensitivity has been examined for a number of species, including TlCN [133], RaOH [54], RaOH + , and ThOH + [94], along with MQM sensitivity for BaOH [134], LuOH + [135], and YbOH [134,136], which is being pursued for an MQM search in a molecular beam [29,110,113]. All of these sensitivities, like E eff , have so far been quite similar to their fluoride analogues.…”

Electronic structure of ytterbium monohydroxide molecule to search for axionlike particles

“…Its relative contribution reaches the maximal value of −2.2% for m a = 10 4 eV and does not exceed 1% by absolute value for other presented m a . It was shown in [46], that electronic correlation can affect the Gaunt contribution to the properties of triatomic molecules, but the absolute value contribution is not significant. We do not include the Gaunt contribution to the values in Table III.…”