ArticleScience advances2020
Two-level systems in superconducting quantum devices due to trapped quasiparticles.
Article in Science advances, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed.
- Universal bound on microwave dissipation in superconducting circuits.Science advances · 2026Article
- A three-dimensional scanning trapped-ion probe.Science advances · 2026Article
- Wafer-Scale Electrical Characterization of Al/AlNanomaterials (Basel, Switzerland) · 2026Article
- Systematic Characterization of Transmon Qubit Stability with Thermal Cycling.Entropy (Basel, Switzerland) · 2026Article
- Spin environment of a superconducting qubit in high magnetic fields.Nature communications · 2025Article
- Transition behavior in extended two-level systems with a band-touching point.Scientific reports · 2025Article
- Error mitigation with stabilized noise in superconducting quantum processors.Nature communications · 2025Article
- Synchronous detection of cosmic rays and correlated errors in superconducting qubit arrays.Nature communications · 2025Article
- In situ scanning gate imaging of individual quantum two-level system defects in live superconducting circuits.Science advances · 2025Article
- The effects of disorder in superconducting materials on qubit coherence.Nature communications · 2025Article
- Probing Non-Equilibrium Pair-Breaking and Quasiparticle Dynamics in Nb Superconducting Resonators Under Magnetic Fields.Materials (Basel, Switzerland) · 2025Article
- Article
- Signatures of a spin-active interface and a locally enhanced Zeeman field in a superconductor-chiral material heterostructure.Science advances · 2024Article
- Quantum bath suppression in a superconducting circuit by immersion cooling.Nature communications · 2023Article
- Improving qubit coherence using closed-loop feedback.Nature communications · 2022Article
- Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects.Science advances · 2021Article
- New material platform for superconducting transmon qubits with coherence times exceeding 0.3 milliseconds.Nature communications · 2021Article
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Authors and funding
9 authors.
Funding
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Abstract
A major issue for the implementation of large-scale superconducting quantum circuits is the interaction with interfacial two-level system (TLS) defects that lead to qubit parameter fluctuations and relaxation. Another major challenge comes from nonequilibrium quasiparticles (QPs) that result in qubit relaxation and dephasing. Here, we reveal a previously unexplored decoherence mechanism in the form of a new type of TLS originating from trapped QPs, which can induce qubit relaxation. Using spectral, temporal, thermal, and magnetic field mapping of TLS-induced fluctuations in frequency tunable resonators, we identify a highly coherent subset of the general TLS population with a low reconfiguration temperature ∼300 mK and a nonuniform density of states. These properties can be understood if the TLS are formed by QPs trapped in shallow subgap states formed by spatial fluctutations of the superconducting order parameter. This implies that even very rare QP bursts will affect coherence over exponentially long time scales.
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