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arXiv · 1909.02866

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

Máté Jenei·Elina Potanina·Ruichen Zhao·Kuan Y. Tan·Alessandro Rossi·Tuomo Tanttu·Kok W. Chan·Vasilii Sevriuk·Mikko Möttönen·Andrew Dzurak
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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.

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Máté Jenei, Elina Potanina, Ruichen Zhao, Kuan Y. Tan, Alessandro Rossi, Tuomo Tanttu, Kok W. Chan, Vasilii Sevriuk, Mikko Möttönen, Andrew Dzurak. 2019-09-06. Waiting time distributions in a two-level fluctuator coupled to a superconducting charge detector. https://doi.org/10.1103/physrevresearch.1.033163

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