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arXiv · 2501.00771

Role of long-range interaction in critical quantum metrology

Zhen-Xia Niu·Qian Wang
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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.

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Zhen-Xia Niu, Qian Wang. 2025-01-01. Role of long-range interaction in critical quantum metrology. https://arxiv.org/abs/2501.00771

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