High-Coherence Fluxonium Qubit
By Long B. Nguyen, Yen-Hsiang Lin, A. Somoroff, R. Mencia, N. Grabon, V. Manucharyan. Physical Review X, 2018
231 citations recorded by the source corpus.
We report superconducting fluxonium qubits with coherence times largely limited by energy relaxation and reproducibly satisfying T2 > 100 microseconds (T2 > 300 microseconds in one device). Moreover, given the state of the art values of the surface loss tangent and the 1/f flux noise amplitude, coherence can be further improved beyond 1 millisecond. Our results violate a common viewpoint that the number of Josephson junctions in a superconducting circuit -- over 100 here -- must be minimized for best qubit coherence. We outline how the unique to fluxonium combination of long coherence time and large anharmonicity can benefit both gate-based and adiabatic quantum computing.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/d8fa24b5257b9eeef45e042e69ab090b9508dcd6
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In Artificial Intelligence
- William D. Oliver
- Youngkyu Sung
- Terry P. Orlando
- Simon Gustavsson
- A. D. Paolo
- Alexandre Blais
- Steven M. Girvin
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- High-Fidelity, Frequency-Flexible Two-Qubit Fluxonium Gates with a Transmon Coupler (2023, background): “edu The fluxonium qubit [5, 21, 22] is a promising alternative to the transmon for gate-based quantum information processing [23], which alleviates both of these drawbacks.”