Strong low-frequency parametric drive on a transmon causes ionization above a threshold that matches Floquet predictions, limiting parametric gate speed.
The dynam- ics are then governed by the Floquet modes |ϕit (t)⟩ and quasienergies ϵit , which satisfy the eigenvalue equation ˆU (t+T, t) |ϕit (t)⟩ = e−iϵit T |ϕit (t)⟩ [35]
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Exceeding the Parametric Drive Strength Threshold in Nonlinear Circuits
Strong low-frequency parametric drive on a transmon causes ionization above a threshold that matches Floquet predictions, limiting parametric gate speed.