Fig. 9: Adiabatic and resonant dispersive sensing of a charge qubit.
From: Compact quantum dot models for analog microwave co-simulation
a Circuit schematic of a DQD charge qubit coupled to a high-Q (Q = 1000) microwave resonator (f0 = 2 GHz). b–e ∣S11∣ parameter for the circuit as a function of frequency and detuning, showing the dispersive shift of the RLC resonator caused by the qubit in the adiabatic (hf0 ≫ 2tc, top) and resonant (hf0 < 2tc, bottom) regimes, in the presence of decoherence that is slow (ℏγ ≪ 2tc, left) or fast (ℏγ ≫ 2tc, right).
