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.
@article{arxiv.1910.13599,
title = {Nuclear Magnetic Resonance model of an entangled sensor under noise},
author = {Le Bin Ho and Yuichiro Matsuzaki and Masayuki Matsuzaki and Yasushi Kondo},
journal= {arXiv preprint arXiv:1910.13599},
year = {2020}
}