Nuclear-spin comagnetometer based on a liquid of identical molecules

Abstract

Atomic comagnetometers are used in searches for anomalous spin-dependent interactions. Magnetic field gradients are one of the major sources of systematic errors in such experiments. Here we describe a comagnetometer based on the nuclear spins within an ensemble of identical molecules. The dependence of the measured spin-precession frequency ratio on the first-order magnetic field gradient is suppressed by over an order of magnitude compared to a comagnetometer based on overlapping ensembles of different molecules. Our single-species comagnetometer is shown to be capable of measuring the hypothetical spin-dependent gravitational energy of nuclei at the $10^{-17}$ eV level, comparable to the most stringent existing constraints. Combined with techniques for enhancing the signal such as parahydrogen-induced polarization, this method of comagnetometry offers the potential to improve constraints on spin-gravity coupling of nucleons by several orders of magnitude.

arXiv comment8 pages, 4 figures

References in corpus (23)

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• Zero- to Ultralow-Field Nuclear Magnetic Resonance $J$-Spectroscopy with Commercial Atomic Magnetometers
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• A Single-species Atomic Comagnetometer Based on 87Rb atoms
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• Interference in Atomic Magnetometry
• What can a GNOME do? Search targets for the Global Network of Optical Magnetometers for Exotic physics searches
• Ferromagnetic Gyroscopes for Tests of Fundamental Physics
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• Extreme nuclear magnetic resonance: zero field, single spins, dark matter...
• Dual frequency caesium spin maser
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• Atomic and molecular transitions induced by axions via oscillating nuclear moments
• Pulsed Dual-axis Alkali-metal-noble-gas Comagnetometer
• Multiparameter quantum metrology using strongly interacting spin systems
• Zero- to ultralow-field nuclear magnetic resonance and its applications
• Oscillating nuclear electric dipole moments inside atoms