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 language | English |
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Article number | 033163 |
Number of pages | 6 |
Journal | Physical Review Research |
Volume | 1 |
Issue number | 3 |
DOIs | |
Publication status | Published - 10 Dec 2019 |
Keywords
- charge fluctuations
- superconducting Josephson-junction-based charge detector
- quantum physics