Entanglement protocol to measure atomic parity violation at sub precision
Phys. Rev. A 113, 032802 – Published 2 March, 2026
DOI: https://doi.org/10.1103/cgsc-gqnq
Abstract
This paper proposes a scheme to measure atomic parity violation in barium ions at precision. The scheme is based on using multiion entangled states to common-mode reject parity-conserving systematic shifts and selectively detect a parity-violating vector light shift. This measurement protocol eliminates the need to suppress a leading systematic by 11 orders of magnitude, as is required in the single-ion measurement scheme [Phys. Rev. Lett. 70, 2383 (1993)]. Furthermore, the protocol can be combined with the use of integrated photonic waveguides in an architecture that is scalable to large ion numbers, with a proportional increase in measurement precision.
