Millisecond Coherence in a Superconducting Qubit

Somoroff, Aaron; Ficheux, Quentin; Mencia, Raymond A.; Xiong, Haonan; Kuzmin, Roman; Manucharyan, Vladimir E.

doi:10.1103/physrevlett.130.267001

Millisecond Coherence in a Superconducting Qubit

Journal Article · Thu Jun 29 00:00:00 EDT 2023 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.130.267001· OSTI ID:2421323

Somoroff, Aaron ^[1]; Ficheux, Quentin ^[2]; Mencia, Raymond A. ^[2]; ^[2]; Kuzmin, Roman ^[2]; Manucharyan, Vladimir E. ^[3]

Univ. of Maryland, College Park, MD (United States); OSTI
Univ. of Maryland, College Park, MD (United States)
Univ. of Maryland, College Park, MD (United States); Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland)

Improving control over physical qubits is a crucial component of quantum computing research. Here we report a superconducting fluxonium qubit with uncorrected coherence time $$T^{*}_{2}$$ = 1.48 ± 0.13 ms, exceeding the state of the art for transmons by an order of magnitude. The average gate fidelity was benchmarked at 0.99991(1). Notably, even in the millisecond range, the coherence time is limited by material absorption and could be further improved with a more rigorous fabrication. Further, our demonstration may be useful for suppressing errors in the next generation quantum processors.

View Accepted Manuscript (DOE)

Research Organization:: Duke Univ., Durham, NC (United States)

Sponsoring Organization:: US Army Research Office (ARO); USDOE Office of Science (SC)

Grant/Contract Number:: SC0019449

OSTI ID:: 2421323

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 130; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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