Bell-state generation in circuit QED via Landau-Zener tunneling

Peter Hänggi, Martijn Wubs, Sigmund Kohler, Keiji Saito, Yosuke Kayanuma

研究成果: Conference contribution

抄録

A qubit may undergo Landau-Zener transitions due to its coupling to one or several quantum harmonic oscillators. First we show that for a qubit coupled to one oscillator, Landau-Zener transitions can be used for single-photon generation and for the controllable creation of qubit-oscillator entanglement, with state-of-the-art circuit QED as a promising realization. Second, for a qubit coupled to two cavities, we show that Landau-Zener sweeps of the qubit are well suited for the robust creation of entangled cavity states, in particular symmetric Bell states, with the qubit acting as the entanglement mediator. Finally, for a qubit coupled to an environment or bath we propose to employ dissipative Landau-Zener sweeps of the qubit for the detection of bath properties. At the heart of our proposals lies the calculation of the exact Landau-Zener transition probability for the qubit, by summing all orders of the corresponding series in time-dependent perturbation theory.

本文言語English
ホスト出版物のタイトルNoise and Fluctuations - 19th International Conference on Noise and Fluctuations, ICNF 2007
ページ501-506
ページ数6
DOI
出版ステータスPublished - 2007
外部発表はい
イベント19th International Conference on Noise and Fluctuations, ICNF2007 - Tokyo, Japan
継続期間: 2007 9 92007 9 14

出版物シリーズ

名前AIP Conference Proceedings
922
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

Other19th International Conference on Noise and Fluctuations, ICNF2007
国/地域Japan
CityTokyo
Period07/9/907/9/14

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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