Nuclear Magnetic Resonance model of an entangled sensor under noise

TL;DR

This paper presents an NMR-based model of an entangled sensor under engineered noise, demonstrating its potential to outperform classical sensors in noisy environments through experimental investigation.

Contribution

It introduces a novel NMR model for entangled sensors under various noisy conditions and experimentally evaluates their performance in time-inhomogeneous noise environments.

Findings

Entangled sensors can surpass classical sensors under certain noisy conditions.

NMR techniques enable quantum sensing with multi-spin molecules.

Engineered noise models help understand sensor fragility and robustness.

Abstract

Entangled sensors have been attracting a lot of attention recently because they can achieve the sensitivity beyond that of the classical sensors. To exploit entanglement as a resource, it is important to understand the effect of noise because the entangled state is fragile against noise. Here, we provide a Nuclear Magnetic Resonance (NMR) model of an entangled sensor under engineered noise: one can implement an entangled sensor under various noisy environments. In particular, we experimentally investigate the performance of the entangled sensor under the effect of time-inhomogeneous noisy environment with which the entangled sensor holds potential to beat the classical sensors. Our "entangled sensor" consists of a multi-spin molecule solved in isotropic liquid, and we can perform the quantum sensing by using NMR techniques.