Fig. 4: A different realization compared to Fig. 3 where we also incorporate a random unitary displacement D(γ) at each timestep as additional noise. Both \({{\rm{Re}}}(\gamma )\) and \({{\rm{Im}}}(\gamma )\) are assumed to be Gaussian random variables of variance κ2/dt, and mean zero. | Nature Communications

Fig. 4: A different realization compared to Fig. 3 where we also incorporate a random unitary displacement D(γ) at each timestep as additional noise. Both \({{\rm{Re}}}(\gamma )\) and \({{\rm{Im}}}(\gamma )\) are assumed to be Gaussian random variables of variance κ2/dt, and mean zero.

From: Detecting single gravitons with quantum sensing

Fig. 4

We take κ = 0.5 × 10−4. The panels again show A the time-continuous readout signal, A the ground state population ρ00, and the population of the C first excited state ρ11 and D the second excited state ρ22 in the bar. After GW incidence, the excitation can be inferred from the measurement, and correlation to independent LIGO detection could confirm the GW as the source with high confidence.

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