Towards Scalable Bosonic Quantum Error Correction

2020/02/29 by Barbara M. Terhal, Jonathan Conrad, Christophe Vuillot · 5 citations
Physics and Astronomy · #quant-ph

paper · pdf · doi:10.1088/2058-9565/ab98a5

54 pages; 18 Figs; 3 Appendices; invited topical review for Quantum Science & Technology. v2 has a few corrections and some additional references. v3 has a few additional corrections and references

arxiv created 2020/06/01 · arxiv updated 2020/06/08

Abstract

We review some of the recent efforts in devising and engineering bosonic qubits for superconducting devices, with emphasis on the Gottesman-Kitaev-Preskill (GKP) qubit. We present some new results on decoding repeated GKP error correction using finitely-squeezed GKP ancilla qubits, exhibiting differences with previously studied stochastic error models. We discuss circuit-QED ways to realize CZ gates between GKP qubits and we discuss different scenario's for using GKP and regular qubits as building blocks in a scalable superconducting surface code architecture.

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