Journal
QUANTUM SCIENCE AND TECHNOLOGY
Volume 5, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2058-9565/ab98a5
Keywords
quantum error correction; superconducting qubits; bosonic codes
Funding
- European Research Council (EQEC, ERC) [682726]
- QuantERA grant for the QCDA consortium
- Perimeter Institute for Theoretical Physics
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Economic Development Innovation
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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 scenarios for using GKP and regular qubits as building blocks in a scalable superconducting surface code architecture.
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