ArticleProceedings of the National Academy of Sciences of the United States of America2023
Dual-rail encoding with superconducting cavities.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- An entangling gate for dual-rail erasure qubits.Nature · 2026Article
- Advancements in superconducting quantum computing.National science review · 2025Review
- Surpassing millisecond coherence in on chip superconducting quantum memories by optimizing materials and circuit design.Nature communications · 2024Article
- Engineering multimode interactions in circuit quantum acoustodynamics.Nature physics · 2024Article
Corrections and comments
- Erratum issued
Authors and funding
18 authors.
Funding
Abstract
The design of quantum hardware that reduces and mitigates errors is essential for practical quantum error correction (QEC) and useful quantum computation. To this end, we introduce the circuit-Quantum Electrodynamics (QED) dual-rail qubit in which our physical qubit is encoded in the single-photon subspace, [Formula: see text], of two superconducting microwave cavities. The dominant photon loss errors can be detected and converted into erasure errors, which are in general much easier to correct. In contrast to linear optics, a circuit-QED implementation of the dual-rail code offers unique capabilities. Using just one additional transmon ancilla per dual-rail qubit, we describe how to perform a gate-based set of universal operations that includes state preparation, logical readout, and parametrizable single and two-qubit gates. Moreover, first-order hardware errors in the cavities and the transmon can be detected and converted to erasure errors in all operations, leaving background Pauli errors that are orders of magnitude smaller. Hence, the dual-rail cavity qubit exhibits a favorable hierarchy of error rates and is expected to perform well below the relevant QEC thresholds with today's coherence times.
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