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Axion-like dark matter search with space-based gravitational wave detectors
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DOI：10.1088/1475-7516/2026/04/082.png)
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Abstract
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We propose a novel modification to the optical benches of space-based gravitational wave detectors (SGWDs) to enable the detection of axion-like dark matter (ALDM)-induced birefringence without altering the polarization of inter-spacecraft laser links. Our design introduces an auxiliary interferometer to convert polarization modulation into measurable phase shifts. Analytical expressions for sensitivity to the ALDM-photon coupling are derived for various time-delay interferometry (TDI) combinations. Projected sensitivity curves demonstrate complementary coverage across the ALDM mass range 10-19 ∼ 10-14 eV. This approach preserves the original interferometric stability while enabling new physics capabilities for SGWDs.
Keywords:
axion-like dark matter
space-based gravitational wave detectors
polarization modulation
phase shifts
time-delay interferometry
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