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.

中文翻译：

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迈向可扩展的玻色子量子纠错

我们回顾了为超导设备设计和工程化玻色量子比特的最新努力，重点是Gottesman–Kitaev–Preskill（GKP）量子比特。我们提出了一些关于使用有限压缩GKP辅助qubit解码重复GKP纠错的新结果，与以前研究的随机误差模型表现出差异。我们讨论了在GKP量子位之间实现CZ门的电路QED方法，并讨论了在可伸缩超导表面代码架构中使用GKP和常规量子位作为构建块的不同方案。