Volume 76, Number 1, October 2006
|Page(s)||22 - 28|
|Section||Atomic and molecular physics|
|Published online||30 August 2006|
Quantum state preparation in circuit QED via Landau-Zener tunneling
Department of Physics, Graduate School of Science, University of Tokyo Tokyo 113-0033, Japan
2 Institut für Physik, Universität Augsburg - D-86135 Augsburg, Germany
3 Department of Mathematical Science, Graduate School of Engineering Osaka Prefecture University - Sakai 599-8531, Japan
Accepted: 8 August 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.
PACS: 32.80.Qk – Coherent control of atomic interactions with photons / 03.67.Lx – Quantum computation / 32.80.Bx – Level crossing and optical pumping
© EDP Sciences, 2006
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