Waiting time distributions in a two-level fluctuator coupled to a superconducting charge detector

Mate Jenei*, Elina Potanina, Ruichen Zhao, Kuan Y. Tan, Alessandro Rossi, Tuomo Tanttu, Kok W. Chan, Vasilii Sevriuk, Mikko Mottonen, Andrew Dzurak

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We analyze charge fluctuations in a parasitic state strongly coupled to a superconducting Josephson-junction-based charge detector. The charge dynamics of the state resembles that of electron transport in a quantum dot with two charge states, and hence we refer to it as a two-level fluctuator. By constructing the distribution of waiting times from the measured detector signal and comparing it with a waiting time theory, we extract the electron in- and out-tunneling rates for the two-level fluctuator, which are severely asymmetric.

Original languageEnglish
Article number033163
Number of pages6
JournalPHYSICAL REVIEW RESEARCH
Volume1
Issue number3
DOIs
Publication statusPublished - 10 Dec 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • SINGLE-ELECTRON TRANSISTOR
  • NOISE

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