Landau-Zener transitions in qubits controlled by electromagnetic fields

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

研究成果: Article

48 引用 (Scopus)

抄録

We investigate the influence of a dipole interaction with a classical radiation field on a qubit during a continuous change of a control parameter. In particular, we explore the non-adiabatic transitions that occur when the qubit is swept with linear speed through resonances with the time-dependent interaction. Two classic problems come together in this model: the Landau-Zener (LZ) and the Rabi problem. The probability of LZ transitions now depends sensitively on the amplitude, the frequency and the phase of the Rabi interaction. The influence of the static phase turns out to be particularly strong, since this parameter controls the time-reversal symmetry of the Hamiltonian. In the limits of large and small frequencies, analytical results obtained within a rotating-wave approximation compare favourably with a numerically exact solution. We discuss physical realizations in microwave optics, quantum dots and molecular nanomagnets.

元の言語English
記事番号218
ジャーナルNew Journal of Physics
7
DOI
出版物ステータスPublished - 2005 10 11
外部発表Yes

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electromagnetic fields
interactions
radiation distribution
quantum dots
optics
dipoles
microwaves
symmetry
approximation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

これを引用

Landau-Zener transitions in qubits controlled by electromagnetic fields. / Wubs, Martijn; Saitou, Keiji; Kohler, Sigmund; Kayanuma, Yosuke; Hänggi, Peter.

:: New Journal of Physics, 巻 7, 218, 11.10.2005.

研究成果: Article

Wubs, Martijn ; Saitou, Keiji ; Kohler, Sigmund ; Kayanuma, Yosuke ; Hänggi, Peter. / Landau-Zener transitions in qubits controlled by electromagnetic fields. :: New Journal of Physics. 2005 ; 巻 7.
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