How much information is carried by fluctuation spectra?
Abstract
Conductance fluctuations are usually described by their rms-amplitude and the half width at half maximum p c of their autocorrelation function. However, since both values may change over the measurement interval they have to be calculated in short stretches of this interval containing only a few fluctuation patterns so as to resolve the evolution of rms-amplitude and p c . Calculating the autocorrelation function on short intervals tends to give estimates for the rms-amplitude and p c with large variances. Sophisticated methods are needed to get the most out of the fluctuation spectra. We present a thorough error analysis for different approaches to this problem and recommend a newly developed method outlined in this paper.
- Publication:
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Advances in Solid State Physics
- Pub Date:
- 1999
- DOI:
- 10.1007/BFb0107515
- Bibcode:
- 1999AdSSP..39..583S
- Keywords:
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- Physics