Quantum state preparation in circuit QED via Landau-Zener tunneling
K Saito, M Wubs, S Kohler, P Hänggi, Y Kayanuma · Europhysics Letters (EPL) · 2006
We study a qubit undergoing Landau-Zener transitions enabled by the coupling to a circuit-QED mode. Summing an infinite-order perturbation series, we determine the exact nonadiabatic transition probability for the qubit, being independent of the frequency of the QED mode. Possible applications are single-photon generation and the controllable creation of qubit-oscillator entanglement.