Performance Analysis of Superconductor-constriction-Superconductor Transmon Qubits
This work presents a computational analysis of a superconducting transmon qubit design, in which the superconductor-insulator-superconductor (SIS) Josephson junction is replaced by a co-planar, superconductor-constriction-superconductor (ScS) nanobridge junction. Within the scope of Ginzburg-Landau...
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Main Authors | , |
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Format | Journal Article |
Language | English |
Published |
10.01.2023
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Subjects | |
Online Access | Get full text |
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Summary: | This work presents a computational analysis of a superconducting transmon
qubit design, in which the superconductor-insulator-superconductor (SIS)
Josephson junction is replaced by a co-planar,
superconductor-constriction-superconductor (ScS) nanobridge junction. Within
the scope of Ginzburg-Landau theory, we find that the nanobridge ScS transmon
has an improved charge dispersion compared to the SIS transmon, with a tradeoff
of smaller anharmonicity. These calculations provide a framework for estimating
the superconductor material properties and junction dimensions compatible with
gigahertz frequency ScS transmon operation. |
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DOI: | 10.48550/arxiv.2301.04276 |