Precision gravimetry via harnessing interaction-induced resonances in optical lattices

TL;DR

This paper investigates how interaction-induced resonances in optical lattices can enhance the precision of gravimetry measurements using Bose-Einstein condensates, analyzing quantum Fisher information scaling.

Contribution

It demonstrates that on-site interactions amplify quantum Fisher information in localized phases, improving gravitational acceleration measurement precision.

Findings

Interaction $U$ amplifies quantum Fisher information at resonance $U=mh$

Localized phase enhances measurement precision

Potential for improved gravitational acceleration sensing

Abstract

By confining a Bose-Einstein condensate in a vertical lattice subjected to a gravitational potential, we analyze the quantum Fisher information to determine its scaling with respect to time, system size and particle number. Our results reveal that in the localized phase, on-site interactions $U$ amplify the quantum Fisher information by a factor with respect to resonance condition $U=mh$ where $U$ is factor of gradient field amplitude $h$. This precision enhancement can be employed in gravitational acceleration measurements with a finite number of particles trapped in optical lattices.