dorsal/arxiv
View SchemaQuantum Fluctuations in Josephson Junction Comparators
| Authors | Thomas J. Walls, Timur V. Filippov, Konstantin K. Likharev |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0207082 |
| URL | https://arxiv.org/abs/quant-ph/0207082 |
| DOI | 10.1103/PhysRevLett.89.217004 |
Abstract
We have developed a method for calculation of quantum fluctuation effects, in particular of the uncertainty zone developing at the potential curvature sign inversion, for a damped harmonic oscillator with arbitrary time dependence of frequency and for arbitrary temperature, within the Caldeira-Leggett model. The method has been applied to the calculation of the gray zone width Delta Ix of Josephson-junction balanced comparators driven by a specially designed low-impedance RSFQ circuit. The calculated temperature dependence of Delta Ix in the range 1.5 to 4.2K is in a virtually perfect agreement with experimental data for Nb-trilayer comparators with critical current densities of 1.0 and 5.5 kA/cm^2, without any fitting parameters.
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"abstract": "We have developed a method for calculation of quantum fluctuation effects, in\nparticular of the uncertainty zone developing at the potential curvature sign\ninversion, for a damped harmonic oscillator with arbitrary time dependence of\nfrequency and for arbitrary temperature, within the Caldeira-Leggett model. The\nmethod has been applied to the calculation of the gray zone width Delta Ix of\nJosephson-junction balanced comparators driven by a specially designed\nlow-impedance RSFQ circuit. The calculated temperature dependence of Delta Ix\nin the range 1.5 to 4.2K is in a virtually perfect agreement with experimental\ndata for Nb-trilayer comparators with critical current densities of 1.0 and 5.5\nkA/cm^2, without any fitting parameters.",
"arxiv_id": "quant-ph/0207082",
"authors": [
"Thomas J. Walls",
"Timur V. Filippov",
"Konstantin K. Likharev"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.89.217004",
"title": "Quantum Fluctuations in Josephson Junction Comparators",
"url": "https://arxiv.org/abs/quant-ph/0207082"
},
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