Role of long-range interaction in critical quantum metrology

TL;DR

This paper investigates how long-range interactions in quantum systems influence measurement precision, demonstrating that such interactions can enhance sensitivity in critical quantum metrology scenarios.

Contribution

It provides a detailed analysis of long-range interactions in a Kiteav chain model, showing their role in improving quantum sensing accuracy.

Findings

Long-range interactions enhance critical parameter estimation sensitivity.

Long-range interactions serve as a valuable resource for quantum metrology.

The study verifies the usefulness of long-range systems in quantum sensing.

Abstract

Long-range interacting quantum systems are useful for improving the performance of various applications of quantum technologies. In this work, we carry out a detailed analysis of how the long-range interaction affects the measurement precision in critical quantum metrology. By employing the paradigmatic model of a Kiteav chain with power-law decaying interaction, we focus on the impacts of long-range interaction on the critical sensing for the scenarios with and without uncertainty in system parameters.We show that the long-range interaction can be used as a valuable resource for enhancing the sensitivity of critical parameter estimation in both scenarios. Our findings not only provide more insights into the features of the long-range interacting systems, but also verify the usefulness of long-range interacting systems in quantum metrology.