Transmon-photon entanglement by engineering shortcuts with optimized drivings

The generation of entangled states in an optimized way is crucial to quantum information science and technology. Here, we propose an effective scheme for rapidly creating the entangled states between a transmon qubit and microwave photons by the technique of shortcuts to adiabaticity. An artificial atom of transmon circuit is coupled to a quantized resonator and a classical driving. The transmon-photon entanglement can be fast induced by inversely engineering the invariant-based Rabi drivings. Comparatively, the present scheme not only reduces the driving number but also employs the Rabi drivings with constant amplitudes. Furthermore, the operation fidelities can be enhanced due to a shorter duration time. Our work could offer an optimized avenue towards fast and robust information processing with superconducting qubits in a cavity.