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arXiv · 2404.12731

Near-Quantum-limited Haloscope Detection of Dark Photon Dark Matter Enhanced by a High-Q Superconducting Cavit

Runqi Kang·Man Jiao·Yu Tong·Yang Liu·Youpeng Zhong·Yi-Fu Cai·Jingwei Zhou·Xing Rong·Jiangfeng Du
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Abstract

We report new experimental results on the search for dark photons based on a near-quantum-limited haloscope equipped with a superconducting cavity. The loaded quality factor of the superconducting cavity is $6\times10^{5}$, so that the expected signal from dark photon dark matter can be enhanced by more than one order compared to a copper cavity. A Josephson parametric amplifier with a near-quantum-limited noise temperature has been utilized to minimize the noise during the search. Furthermore, a digital acquisition card based on field programmable gate arrays has been utilized to maximize data collection efficiency with a duty cycle being 100$\%$. This work has established the most stringent constraints on dark photons at around 26.965 $\mu$eV. In the future, our apparatus can be extended to search for other dark matter candidates, such as axions and axion-like particles, and scrutinize new physics beyond the Standard Model.

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Runqi Kang, Man Jiao, Yu Tong, Yang Liu, Youpeng Zhong, Yi-Fu Cai, Jingwei Zhou, Xing Rong, Jiangfeng Du. 2024-04-19. Near-Quantum-limited Haloscope Detection of Dark Photon Dark Matter Enhanced by a High-Q Superconducting Cavit. https://arxiv.org/abs/2404.12731

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