Position measurement of a dipolar scatterer via self-homodyne detection

TL;DR

This paper introduces a self-homodyne detection method for precisely measuring the position of a dipolar scatterer, potentially reaching the Heisenberg limit and applicable in optomechanics and ion trapping.

Contribution

It presents a novel technique for position measurement that theoretically achieves the Heisenberg limit, advancing precision in optical scatterer localization.

Findings

Method can reach the Heisenberg limit in theory

Applicable to levitated optomechanics and trapped ions

Enhances precision in position determination

Abstract

We describe a technique to measure the position of a dipolar scatterer based on self-homodyne detection of the scattered light. The method can theoretically reach the Heisenberg limit, at which information gained about the position is constrained only by the back-action of the scattered light. The technique has applications in the fields of levitated optomechanics and trapped ions and is generally applicable to the position determination of confined light scatterers.