Waiting Time Correlations in Transport through Two Coupled Quantum Dots

Ptaszyński, Krzysztof

doi:10.12693/aphyspola.130.1233

Cited by 1 publication

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References 10 publications

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“…Similar correlations in a double dot system, in which both tunneling rates in the upper dot were assumed to be modulated, have been studied previously in Ref. [69]. As Fig.…”

Section: B Resultsmentioning

confidence: 63%

Nonrenewal statistics in transport through quantum dots

Ptaszyński

2017

Phys. Rev. B

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The distribution of waiting times between successive tunneling events is an already established method to characterize current fluctuations in mesoscopic systems. Here, I investigate mechanisms generating correlations between subsequent waiting times in two model systems, a pair of capacitively coupled quantum dots and a single-level dot attached to spin-polarized leads. Waiting time correlations are shown to give an insight into the internal dynamics of the system, for example they allow distinction between different mechanisms of the noise enhancement. Moreover, the presence of correlations breaks the validity of the renewal theory. This increases the number of independent cumulants of current fluctuation statistics, thus providing additional sources of information about the transport mechanism. I also propose a method for inferring the presence of waiting time correlations based on low-order current correlation functions. This method gives a way to extend the analysis of nonrenewal current fluctuations to the systems for which single-electron counting is not experimentally feasible. The experimental relevance of the findings is also discussed, for example reanalysis of previous results concerning transport in quantum dots is suggested.Comment: 16 pages, 13 figures. Accepted for publication in Phys. Rev.

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“…Similar correlations in a double dot system, in which both tunneling rates in the upper dot were assumed to be modulated, have been studied previously in Ref. [69]. As Fig.…”

Section: B Resultsmentioning

confidence: 63%

Nonrenewal statistics in transport through quantum dots

Ptaszyński

2017

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

Waiting Time Correlations in Transport through Two Coupled Quantum Dots

Cited by 1 publication

References 10 publications

Nonrenewal statistics in transport through quantum dots

Nonrenewal statistics in transport through quantum dots

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