Earth as a transducer for ultralight bosonic dark-matter detection
Abstract
Ultralight bosonic dark matter (UBDM) that couples to electromagnetism can generate an oscillating magnetic-field signal at the Earth's surface. This is referred to as the ``Earth transducer" effect, as the Earth converts UBDM into a detectable magnetic field. Similar DM-induced fields in laboratory experiments typically scale with the size L of the experiment. Because the Earth transducer signal instead scales with the large radius of the Earth, R, it is one of the most powerful direct probes of UBDM with masses mDM≲1/R∼3×10−14 eV. It has many other favorable properties, such as high spatial and temporal coherence and robustness to atmospheric modeling. In this review, we derive the Earth transducer effect and its properties for multiple UBDM models, and discuss current and future prospects to detect it.
Versions
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BibTeX
@misc{kalia2026earth,
title = {{Earth as a transducer for ultralight bosonic dark-matter detection}},
author = {Saarik Kalia and Ibrahim A. Sulai},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2607.16342},
eprint = {2607.16342},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.16342},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Earth as a transducer for ultralight bosonic dark-matter detection
AU - Saarik Kalia
AU - Ibrahim A. Sulai
PY - 2026
DA - 2026/09/22
PB - arXiv
DO - 10.48550/arxiv.2607.16342
UR - https://arxiv.org/abs/2607.16342
AB - Ultralight bosonic dark matter (UBDM) that couples to electromagnetism can generate an oscillating magnetic-field signal at the Earth's surface. This is referred to as the ``Earth transducer" effect, as the Earth converts UBDM into a detectable magnetic field. Similar DM-induced fields in laboratory experiments typically scale with the size L of the experiment. Because the Earth transducer signal instead scales with the large radius of the Earth, R, it is one of the most powerful direct probes of UBDM with masses m_DM≲1/R∼3×10^−14 eV. It has many other favorable properties, such as high spatial and temporal coherence and robustness to atmospheric modeling. In this review, we derive the Earth transducer effect and its properties for multiple UBDM models, and discuss current and future prospects to detect it.
ER -