Improved bounds on Lorentz violation from composite pulse Ramsey spectroscopy in a trapped ion.

ABSTRACT: In attempts to unify the four known fundamental forces in a single quantum-consistent theory, it is suggested that Lorentz symmetry may be broken at the Planck scale. Here we search for Lorentz violation at the low-energy limit by comparing orthogonally oriented atomic orbitals in a Michelson-Morley-type experiment. We apply a robust radiofrequency composite pulse sequence in the ²F_7/2 manifold of an Yb⁺ ion, extending the coherence time from 200 μs to more than 1 s. In this manner, we fully exploit the high intrinsic susceptibility of the ²F_7/2 state and take advantage of its exceptionally long lifetime. We match the stability of the previous best Lorentz symmetry test nearly an order of magnitude faster and improve the constraints on

SUBMITTER: Dreissen LS 

PROVIDER: S-EPMC9701673 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature