ArticleNature communications2022
Phonon downconversion to suppress correlated errors in superconducting qubits.
Article in Nature communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 59 citations in OpenAlex.
- Universal bound on microwave dissipation in superconducting circuits.Science advances · 2026Article
- Synchronous detection of cosmic rays and correlated errors in superconducting qubit arrays.Nature communications · 2025Article
- Cosmic-ray-induced correlated errors in superconducting qubit array.Nature communications · 2025Article
- Quantum Error Mitigation in Optimized Circuits for Particle-Density Correlations in Real-Time Dynamics of the Schwinger Model.Entropy (Basel, Switzerland) · 2025Article
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Authors and funding
9 authors at 2 institutions in 1 country.
Funding
Abstract
Quantum error correction can preserve quantum information in the presence of local errors, but correlated errors are fatal. For superconducting qubits, high-energy particle impacts from background radioactivity produce energetic phonons that travel throughout the substrate and create excitations above the superconducting ground state, known as quasiparticles, which can poison all qubits on the chip. We use normal metal reservoirs on the chip back side to downconvert phonons to low energies where they can no longer poison qubits. We introduce a pump-probe scheme involving controlled injection of pair-breaking phonons into the qubit chips. We examine quasiparticle poisoning on chips with and without back-side metallization and demonstrate a reduction in the flux of pair-breaking phonons by over a factor of 20. We use a Ramsey interferometer scheme to simultaneously monitor quasiparticle parity on three qubits for each chip and observe a two-order of magnitude reduction in correlated poisoning due to background radiation.
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Registered trials
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