内容：

Preparing high-accuracy logical magic states is crucial for fault-tolerant quantum computation. In this talk, we will introduce our recent logical T state preparation protocol (arXiv:2503.18657). Among prior attempts to reduce the substantial cost of magic state preparation, magic state cultivation (MSC), a protocol proposed by Gidney et al. for preparing logical T states without magic state distillation, achieves state-of-the-art efficiency. Inspired by this work, we propose a new MSC procedure that would produce a logical T state on a rotated surface code at a further reduced cost. For our MSC protocol, we construct a new code family, the RP^2 code as well as two self-dual CSS codes, SRP-3 and SRP-5, and also make use of non-local connectivity, available on both neutral atom array and ion trap platforms. According to our Monte Carlo sampling results, our MSC protocol requires about an order of magnitude smaller space-time cost to reach a target logical error rate around 1e-6 or 1e-9 compared to the original MSC protocol.

Ref: arXiv:2503.18657

人物介绍：

Zihan Chen is a PhD student at USTC (University of Science and Technology of China). He has a broad interest in quantum information theory and is currently focused on fault-tolerant quantum computation. He spends most of his time trying to reduce the space-time cost of (arbitrarily) high-accuracy logical operations under physical noise.