کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1546738 997622 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Entanglement creation in circuit QED via Landau–Zener sweeps
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Entanglement creation in circuit QED via Landau–Zener sweeps
چکیده انگلیسی

A qubit may undergo Landau–Zener transitions due to its coupling to one or several quantum harmonic oscillators. 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. Moreover, 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. 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. This transition probability emerges to be independent of the oscillator frequencies, both inside and outside the regime where a rotating-wave approximation is valid.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 40, Issue 1, October 2007, Pages 187–197
نویسندگان
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