Dear all, This week will be the 8th "Harvard Quantum Information Group Meeting", which will be held on Thursday, November 17th at 4:30 pm in Jefferson 250. This week, Eugene Tang from MIT will give a tutorial first, then Aleksander Kubica from AWS center for quantum computing will give a talk. Title: Overview of Quantum Error-Correction (by Eugene) Abstract: In the first part of the talk, we will provide a tutorial overview of quantum error-correction. We will talk about quantum CSS codes, the homological view of the toric code, noise models, and the syndrome decoding problem. We will then talk about minimum-weight perfect matching (MWPM) decoding of the toric code, including how to handle the case of noisy syndrome measurements. This part of the talk will be intended for audiences with minimal familiarity with quantum error-correction with the goal of setting up for Alex's second part. Title: Single-shot quantum error correction (by Alex) Abstract: Fault-tolerant protocols and quantum error correction (QEC) are essential to building reliable quantum computers from imperfect components that are vulnerable to errors. Optimizing the resource and time overheads needed to implement QEC is one of the most pressing challenges. In this talk, I will introduce a new topological QEC code, the three-dimensional subsystem toric code (3D STC). I will explain how the 3D STC allows for single-shot QEC, i.e., reliable QEC with no time overhead even in the presence of measurement errors. Due to its high QEC threshold together with local parity checks of small weight, the 3D STC is particularly appealing for realizing fault-tolerant quantum computing. Based on A. Kubica, M. Vasmer, Nat. Commun. 13, 6272 (2022). Here is the link of <https://calendar.google.com/calendar/u/0?cid=Y185MWI0YjdkMWE3YmJjYzkwODNlNTIzMDczM2I3NDYwZGU5YWJkMzdkMWE5NjAyYWI4YTg3MTZmNWNlYThiZGZlQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20>google calenda <https://calendar.google.com/calendar/u/0?cid=Y185MWI0YjdkMWE3YmJjYzkwODNlNTIzMDczM2I3NDYwZGU5YWJkMzdkMWE5NjAyYWI4YTg3MTZmNWNlYThiZGZlQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20>r for the next few meetings. The meeting is open to everyone at Harvard interested in quantum information, including those in condensed matter physics, AMO physics, high energy physics, computer science, chemistry, etc. The format includes weekly tutorials (by both external and internal speakers) of contemporary topics in quantum information and quantum computing, aimed for a broad scientific audience. We will also try to foster connections between different groups at Harvard which are interested in or involved with quantum information, and build a broader community. Hope to see you all there. If you would like to join the mailing list for this meeting, please e-mail harvardqimeeting(a)gmail.com <mailto:harvardqimeeting@gmail.com> which will add you.