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

Jenei, Máté and Potanina, Elina and Zhao, Ruichen and Tan, Kuan Y. and Rossi, Alessandro and Tanttu, Tuomo and Chan, Kok W. and Sevriuk, Vasilii and Möttönen, Mikko and Dzurak, Andrew (2019) Waiting time distributions in a two-level fluctuator coupled to a superconducting charge detector. Physical Review Research, 1 (3). 033163. ISSN 2643-1564

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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.

    ORCID iDs

    Jenei, Máté, Potanina, Elina, Zhao, Ruichen, Tan, Kuan Y., Rossi, Alessandro ORCID logoORCID: https://orcid.org/0000-0001-7935-7560, Tanttu, Tuomo, Chan, Kok W., Sevriuk, Vasilii, Möttönen, Mikko and Dzurak, Andrew;