Poisson transition rates from time-domain measurements with a finite bandwidth.
Poisson transition rates from time-domain measurements with a finite bandwidth.
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有限带宽时域测量的泊松转变率。
DOI：
10.1103/physrevlett.96.100201
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发表时间：
2005
影响因子：
8.6
通讯作者：
J. Aumentado
中科院分区：
文献类型：
--
作者：
O. Naaman;J. Aumentado
在泊松二能级系统的时域测量中，观测到的跃迁速率总是小于实际系统的跃迁速率，这是实验中测量带宽有限的一般结果。即使测量和检测设备比所研究的过程快10倍，这种对速率的低估也是显著的。我们在这里导出了这种校正的定量形式，使用包括检测设备的简单状态转换模型，并提供了一种从带宽有限的测量中确定系统实际转换速率的方法。我们用计算机模拟和单库珀对晶体管中准粒子隧穿的时域测量数据来支持我们的结果。
In time-domain measurements of a Poisson two-level system, the observed transition rates are always smaller than those of the actual system, a general consequence of a finite measurement bandwidth in an experiment. This underestimation of the rates is significant even when the measurement and detection apparatus are 10 times faster than the process under study. We derive here a quantitative form for this correction, using a straightforward state transition model that includes the detection apparatus, and provide a method for determining a system's actual transition rates from bandwidth-limited measurements. We support our results with computer simulations and experimental data from time-domain measurements of quasiparticle tunneling in a single-Cooper-pair transistor.