Fig. 6: Schematic of the measurement protocols being considered.
From: Quantum-enhanced dark matter detection with in-cavity control: mitigating the Rayleigh curse
Specifically, we plot the linear homodyne measurement (a, d, f), heterodyne measurement (b), and the photon number counting measurement (c, e, g), for the three inputs: vacuum (a–c), SMSS (d, e), and TMSS (f, g), respectively. All modes S and A are initially in vacuum (up to inevitable thermal noise due to limited cooling).
