Quantum sensing provides sensitive tabletop tools to search for exotic spin-dependent interactions beyond the Standard Model, which has attracted great attention in theories and experiments. Here we develop a technique based on quantum Spin Amplifier for Particle PHysIcs REsearch (SAPPHIRE) to resonantly search for exotic interactions, specifically parity-odd spin-spin interactions. The present technique effectively amplifies the pseudomagnetic field generated by exotic interactions by a factor of about 200 while being insensitive to spurious external magnetic fields. Our studies, using such a quantum amplification technique, open the doors to exploring the parity-violation interactions mediated by Z' bosons in the challenging parameter space (force range between 3 mm and 0.1 km) and set the most stringent constraints on Z'-mediated electron-neutron couplings, significantly improving previous limits by up to five orders of magnitude. Moreover, our bounds on Z'-mediated couplings between nucleons reaches into a hitherto unexplored parameter space (force range below 1 m), complementing the existing astrophysical and laboratory studies.
Cite
@article{arxiv.2205.07222,
title = {SAPPHIRE: Search for exotic parity-violation interactions with quantum spin amplifiers},
author = {Yuanhong Wang and Ying Huang and Chang Guo and Min Jiang and Xiang Kang and Haowen Su and Yushu Qin and Wei Ji and Dongdong Hu and Xinhua Peng and Dmitry Budker},
journal= {arXiv preprint arXiv:2205.07222},
year = {2023}
}