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

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 co...

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Bibliographic Details
Published in:arXiv.org 2019-09
Main Authors: Jenei, Máté, Potanina, Elina, Zhao, Ruichen, Tan, Kuan Y, Rossi, Alessandro, Tanttu, Tuomo, Chan, Kok W, Sevriuk, Vasilii, Möttönen, Mikko, Dzurak, Andrew
Format: Article
Language:English
Subjects:
Electron transport
Quantum dots
Sensors
Superconductivity
Variation
Waiting period
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1909.02866