Experimental demonstration of shaken lattice interferometry

TL;DR

This paper experimentally demonstrates shaken lattice interferometry using atom manipulation in optical lattices, showing quadratic sensitivity scaling and capabilities for signal sign measurement and optimization.

Contribution

It introduces an experimental implementation of shaken lattice interferometry with optimized phase modulation to enhance atom interferometry performance.

Findings

Sensitivity scales as the square of the interrogation time

Able to measure the sign of an applied signal

Optimized interferometer performance in the presence of bias

Abstract

We experimentally demonstrate a shaken lattice interferometer. Atoms are trapped in the ground Bloch state of a red-detuned optical lattice. Using a closed-loop optimization protocol based on the dCRAB algorithm, we phase-modulate (shake) the lattice to transform the atom momentum state. In this way, we implement an atom beamsplitter and build five interferometers of varying interrogation times $T_I$. The sensitivity of shaken lattice interferometry is shown to scale as $T_I^2$, consistent with simulation [1]. Finally, we show that we can measure the sign of an applied signal and optimize the interferometer in the presence of a bias signal. [1] C. A. Weidner, H. Yu, R. Kosloff, and D. Z. Anderson, Phys. Rev. A 95, 043624 (2017).