Quantum state preparation in circuit QED via Landau-Zener tunneling

Abstract

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.

7 pages, 3 figures

References in corpus (2)

• Landau-Zener transitions in qubits controlled by electromagnetic fields
• Observation of macroscopic Landau-Zener transitions in a superconducting device

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