Superadiabatic population transfer in a three-level superconducting circuit

TL;DR

This paper demonstrates a superadiabatic method to accelerate population transfer in a three-level superconducting circuit, enhancing speed and robustness by suppressing non-adiabatic excitations with an additional microwave pulse.

Contribution

The study introduces a superadiabatic approach to improve the speed and robustness of adiabatic population transfer in superconducting circuits, specifically applying it to stimulated Raman adiabatic passage.

Findings

Achieved faster population transfer using superadiabatic method.

Suppressed non-adiabatic excitations with an additional two-photon microwave pulse.

Demonstrated robust transfer from ground to second excited state.

Abstract

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.