Fig. 2: Realization of the parametric reset on Q1.
From: Rapid and unconditional parametric reset protocol for tunable superconducting qubits
a Experimental sequence of the parametric reset. A π-pulse is applied to the qubit and followed by a sinusoidal parametric reset pulse. The amplitude A and angular frequency ωm are two adjustable parameters. b Two dimensional scan of the \(\left|e\right\rangle\) population, pe when ωq/2π = 5.784 GHz, ωr/2π = 6.441 GHz, Δ/2π = − 0.659 GHz. The x-axis is the parametric amplitude in the magnetic flux quantum Φ0 and the y-axis is the modulation frequency. First, second, and third-order modulations are labeled n = 1, 2, 3, respectively. c Time evolution of the excited state population, after parametric modulation corresponding to the three points A, B, C in the n = 1 region in b. Dots are the raw data acquired by direct readout measurements, and solid lines are fits to the theoretical model. The insert shows theoretical values of Γ/κr vs. ∣gn∣/κ, where Γ is the reset rate of the qubit during the reset process. d Master equation simulation of the whole process with the same parameters as the experimental (b).
