Identifying Monochromatic Signals in LISA and Taiji via Spectral Split: Gravitational Waves versus Ultralight Dark Matter
The study proposes using spectral splitting to distinguish monochromatic signals from ultralight dark matter (ULDM) and gravitational waves (GWs). By analyzing how detector motion modulates these signals into harmonics, researchers found that GW spectra contain significantly more higher-order harmonics than ULDM spectra, allowing for clear signal discrimination.