Dissecting axion and dark photon with a network of vector sensors

Abstract

We develop formalisms for a network of vector sensors, sensitive to certain spatial components of the signals, to identify the properties of a light axion or a dark photon background. These bosonic fields contribute to vector-like signals in the detectors, including effective magnetic fields triggering the spin precession, effective electric currents in a shielded room, and forces on the matter. The interplay between a pair of vector sensors and a baseline that separates them can potentially uncover rich information of the bosons, including angular distribution, polarization modes, source localization, and macroscopic circular polarization. Using such a network, one can identify the microscopic nature of a potential signal, such as distinguishing between the axion-fermion coupling and the dipole couplings with the dark photon.

16 pages, 8 figures, published version in PRR

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• Broadband sensitivity improvement via coherent quantum feedback with PT symmetry
• Stochastic Properties of Ultralight Scalar Field Gradients

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• Pulsar Timing Residual induced by Wideband Ultralight Dark Matter with Spin 0, 1, 2
• A Quantum Description of Wave Dark Matter
• Searches for exotic spin-dependent interactions with spin sensors
• Cavity as Radio Telescope for Galactic Dark Photon
• Simultaneous Resonant and Broadband Detection of Ultralight Dark Matter and High-Frequency Gravitational Waves via Cavities and Circuits