Landau-Zener interferometry for qubits

被引：0
|
作者：
A. V. Shytov
D. A. Ivanov
M. V. Feigel’man
机构：
[1] L.D. Landau Institute for Theoretical Physics,Institute for Theoretical Physics
[2] University of California at Santa Barbara,undefined
[3] Institute for Theoretical Physics,undefined
来源：
The European Physical Journal B - Condensed Matter and Complex Systems | 2003年 / 36卷
关键词：
Coherence; Control Parameter; Absorption Rate; Energy Absorption; Interference Pattern;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
One may probe coherence of a qubit by periodically sweeping its control parameter. The qubit is then excited by the Landau-Zener (LZ) mechanism. The interference between multiple LZ transitions leads to an oscillatory dependence of the energy absorption rate on the sweeping amplitude and on the period. This interference pattern allows to determine the decoherence time of the qubit. We introduce a simple phenomenological model describing this “interferometer”, and find the form of the interference pattern.
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页码：263 / 269
页数：6
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