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arXiv · 2205.07222

SAPPHIRE: Search for exotic parity-violation interactions with quantum spin amplifiers

Yuanhong Wang·Ying Huang·Chang Guo·Min Jiang·Xiang Kang·Haowen Su·Yushu Qin·Wei Ji·Dongdong Hu·Xinhua Peng·Dmitry Budker
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Abstract

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.

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Yuanhong Wang, Ying Huang, Chang Guo, Min Jiang, Xiang Kang, Haowen Su, Yushu Qin, Wei Ji, Dongdong Hu, Xinhua Peng, Dmitry Budker. 2022-05-15. SAPPHIRE: Search for exotic parity-violation interactions with quantum spin amplifiers. https://doi.org/10.1126/sciadv.eade0353

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