Fig. 1: Simulated power spectrum density(PSD) and signal sensitivities on gs for the flat and peaked regimes at f0 = 10 Hz.
From: Constraining ultralight dark matter through an accelerated resonant search
Panels (a, b) illustrate the simulated PSD while panels (c, d) show the corresponding signal sensitivities on gs for the flat and peaked regimes at f0 = 10 Hz, respectively. In both panels, we fix Σa = 0.1 and Σna = 500. We set \(q=\sqrt{500}\) in flat regime and q = 500 in peaked regime, leading to different κ. The dotted blue lines, dashed lines, and black solid lines represent the photon shot noise, magnetic noise after amplification and the total noise. The gray line depicts the simulated total PSD. The bottom panel presents the sensitivity with respect to the signal strength gs, showcasing spiky red lines from the simulation and a solid thick line from the analytic calculation. The full width at half maximum sensitivity \({\Gamma }_{{{{{{{{\rm{FWHM}}}}}}}}}^{{{{{{{{\rm{sen}}}}}}}}}\) and the optimal sensitivity \({g}_{{{{{{{{\rm{s}}}}}}}}}^{\min }\) are illustrated.
