Integer Fluxonium Qubit
- URL: http://arxiv.org/abs/2403.16780v1
- Date: Mon, 25 Mar 2024 13:55:20 GMT
- Title: Integer Fluxonium Qubit
- Authors: Raymond A. Mencia, Wei-Ju Lin, Hyunheung Cho, Maxim G. Vavilov, Vladimir E. Manucharyan,
- Abstract summary: We describe a superconducting qubit derived from operating a fluxonium circuit in a zero magnetic field.
The Ramsey coherence time exceeds 100 us, and the average fidelity of Clifford gates is benchmarked to $mathcalF > 0.999$.
Our work establishes a ready-to-use partially protected" superconducting qubit with an error rate comparable to the best transmons.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We describe a superconducting qubit derived from operating a properly designed fluxonium circuit in a zero magnetic field. The qubit has a frequency of about 4 GHz and the energy relaxation quality factor $Q \approx 0.7\times 10^7$, even though the dielectric loss quality factor of the circuit components is in the low $10^5$ range. The Ramsey coherence time exceeds 100 us, and the average fidelity of Clifford gates is benchmarked to $\mathcal{F} > 0.999$. These figures are likely to improve by an order of magnitude with optimized fabrication and measurement procedures. Our work establishes a ready-to-use ``partially protected" superconducting qubit with an error rate comparable to the best transmons.
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