动态去耦噪声谱中连续谱与离散谱的转换
Transition between continuous and discrete spectra in dynamical-decoupling noise spectroscopy
摘要：
在这里，我们探索的前景进行单量子位光谱的环境噪声时，由动态去耦脉冲序列产生的频率滤波器的分辨率可以设置得足够高，以揭示离散结构的噪声谱密度。当滤波器不能分辨离散的谱线并且在量子比特的退相干率中仅记录谱的粗粒度近似时，光谱学的标准形式是适用的。当离散结构变得可访问时，量子位探针以质的不同方式演化，并且必须重新设计恢复谱密度的过程。
英文摘要：
Here, we explore the prospects of carrying out the single qubit spectroscopy of environmental noise when the resolution of the frequency filters produced by the dynamical decoupling pulse sequences can be set high enough to reveal the discrete structure of the noise spectral density. The standard form of spectroscopy is applicable when the filter is unable to resolve the discrete spectral lines and only coarse grained approximation of the spectrum is recorded in the qubit's decoherence rate. When the discrete structure becomes accessible, the qubit probe evolves in a qualitatively different manner, and the procedure for recovering spectral density has to be redesigned.
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