  Adiabatic manipulation of the quantum state is an essential tool in modern
quantum information processing. Here we demonstrate the speed-up of the
adiabatic population transfer in a three-level superconducting transmon circuit
by suppressing the spurious non-adiabatic excitations with an additional
two-photon microwave pulse. We apply this superadiabatic method to the
stimulated Raman adiabatic passage, realizing fast and robust population
transfer from the ground state to the second excited state of the quantum
circuit.
