Experimental Quantum Error Correction of Binomial Bosonic Codes*

Quantum error correction (QEC) is essential for achieving universal and scalable quantum computation, as quantum systems inevitably interact with the environment. Among various QEC schemes, bosonic encodings in superconducting microwave modes are appealing because of the hardware efficiency of bosonic modes with the intrinsically large Hilbert space for redundant information encoding. Recent years have witnessed significant experimental advancements in implementing bosonic QEC in superconducting circuits. In this talk, I will focus on our recent progress in QEC using binomial bosonic codes [1]. Specifically, I will discuss our successful demonstration of surpassing the breakeven point of QEC [2] and protecting quantum entanglement between two bosonic logical qubits via QEC [3].

[1] M.H. Michael, et al. Phys. Rev. X 6, 031006 (2016).

[2] Ni Z, et al. Nature 616, 56 (2023).

[3] W. Cai, et al. arXiv: 2302.13027 (2023).