Measurement of the superconducting flux qubit parameters in the quasi-dispersive regime

This paper reports on the results of the investigation of a superconducting flux quantum bit (qubit) in the quasi-dispersive regime, where the frequency of a probe signal even though is lower than, but, nevertheless, close to the excitation frequency of the qubit. In this regime, in contrast to the...

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Published in:Physics of the solid state 2016-11, Vol.58 (11), p.2155-2159
Main Authors: Novikov, I. L., Ivanov, B. I., Sultanov, A. N., Greenberg, Ya. S., Il’ichev, E. V.
Format: Article
Language:English
Subjects:
Analysis
Emission analysis
Excitation
Measurement
Metals
Physics
Physics and Astronomy
Quantum theory
Solid State Physics
Spontaneous emission
Superconductivity
Superconductors
Waveguides
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cited_by cdi_FETCH-LOGICAL-c389t-612c2804c2886dc5768eaeba57ffbebc8fec690d009f5611cd61297a45ef02313
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description This paper reports on the results of the investigation of a superconducting flux quantum bit (qubit) in the quasi-dispersive regime, where the frequency of a probe signal even though is lower than, but, nevertheless, close to the excitation frequency of the qubit. In this regime, in contrast to the known experiments, the interaction of the qubit with a waveguide leads not only to a shift of the resonance frequency, which is characteristic of the dispersive regime, but also to a significant broadening of the resonance line due to the spontaneous emission of the qubit. On the basis of the analysis of the amplitude–frequency characteristic of the transmission signal, this makes it possible to determine, under single-frequency excitation, the characteristic parameters of the qubit inductively coupled to the coplanar resonator.
doi_str_mv 10.1134/S1063783416110287
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subjects Analysis
Emission analysis
Excitation
Measurement
Metals
Physics
Physics and Astronomy
Quantum theory
Solid State Physics
Spontaneous emission
Superconductivity
Superconductors
Waveguides
title Measurement of the superconducting flux qubit parameters in the quasi-dispersive regime
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