ArticleNature communications2024
Surpassing millisecond coherence in on chip superconducting quantum memories by optimizing materials and circuit design.
Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Universal bound on microwave dissipation in superconducting circuits.Science advances · 2026Article
- Krypton-sputtered tantalum films for scalable high-performance quantum devices.Nature materials · 2026Article
- All-nitride superconducting qubits based on atomic layer deposition.Nature materials · 2026Article
- Wafer-Scale Electrical Characterization of Al/AlNanomaterials (Basel, Switzerland) · 2026Article
- Tantalum alloy-based resonators for quantum information systems.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Article
- Spectral signature of high-order photon processes enhanced by Cooper-pair pairing.Nature communications · 2025Article
- Advancements in superconducting quantum computing.National science review · 2025Review
- Quantum control of an oscillator with a Kerr-cat qubit.Nature communications · 2025Article
- Article
Corrections and comments
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Authors and funding
13 authors.
Funding
Abstract
The performance of superconducting quantum circuits for quantum computing has advanced tremendously in recent decades; however, a comprehensive understanding of relaxation mechanisms does not yet exist. In this work, we utilize a multimode approach to characterizing energy losses in superconducting quantum circuits, with the goals of predicting device performance and improving coherence through materials, process, and circuit design optimization. Using this approach, we measure significant reductions in surface and bulk dielectric losses by employing a tantalum-based materials platform and annealed sapphire substrates. With this knowledge we predict the relaxation times of aluminum- and tantalum-based transmon qubits, and find that they are consistent with experimental results. We additionally optimize device geometry to maximize coherence within a coaxial tunnel architecture, and realize on-chip quantum memories with single-photon Ramsey times of 2.0 - 2.7 ms, limited by their energy relaxation times of 1.0 - 1.4 ms. These results demonstrate an advancement towards a more modular and compact coaxial circuit architecture for bosonic qubits with reproducibly high coherence.
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Registered trials
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