Realization of invariant-based shortcuts to population inversion with a superconducting circuit

Shortcuts to adiabaticity have been proved an effective routine for precise quantum state manipulation. Here, we experimentally demonstrate invariant-based shortcuts to adiabaticity to speed up the population transfer in a superconducting circuit. Through inverse engineering of the Hamiltonian, we realize this protocol in a single-qubit and a two-qubit system. The Lewis-Risenfeld phase is characterized experimentally. Furthermore, we investigate the robustness of the scheme against amplitude and frequency errors.

Automated summary

Shortcuts to adiabaticity have been shown to be an effective routine for precise quantum state manipulation. In this study, invariant-based shortcuts to adiabaticity were experimentally demonstrated to speed up population transfer in a superconducting circuit. The robustness of the scheme against amplitude and frequency errors was also investigated.