Harnessing the center-of-mass excitations in quantum metrology

TL;DR

This paper explores how center-of-mass excitations in quantum systems like Bose-Einstein condensates and Coulomb crystals can be harnessed for quantum-enhanced measurements, introducing a simulation method for optimal detection.

Contribution

It introduces a novel approach to quantum metrology using center-of-mass excitations and presents a method to simulate homodyne detection for these excitations.

Findings

Center-of-mass excitations can be used for quantum-enhanced measurements.

A simulation method for homodyne detection of these excitations is proposed.

Potential for improved measurement precision in quantum systems.

Abstract

In quantum metrology, one typically creates correlations among atoms or photons to enhance measurement precision. Here, we show how one can use other excitations to perform quantum-enhanced measurements on the example of center-of-mass excitations of a spin-orbit coupled Bose-Einstein condensate and a Coulomb crystal. We also present a method to simulate a homodyne detection of center-of-mass excitations in these systems, which is required for optimal estimation.