Speaker: Hedongliang Liu. Dr. Liu is currently a postdoctoral researcher at the Communication Engineering Lab in Karlsruhe Institute for Technology (KIT), Germany. Prior to this, she was a research assistant since March 2019 in the group of Coding and Cryptography led by Prof. Dr.-Ing. Antonia Wachter-Zeh at Technical University of Munich (TUM), Germany. She obtained the Ph.D. degree in Electrical Engineering in 2024 from TUM, the M.Sc. degree in Communication Engineering in 2018 from TUM, and the B.Eng. degree in Information Engineering in 2016 from Southeast University, P.R. China. Her research areas include the theory and applications of error-correction codes in classical and quantum information systems; in particular, her recent work focuses on quantum error correction and fault-tolerant quantum computing.

Date: January 4, 2026

Time: 14:00-15:30 pm

Location: E119, Huagang East Building, Shandong University Qingdao Campus

Sponsor: Research Center for Mathematics and Interdisciplinary Sciences, Shandong University

Abstract:

Quantum error correction is essential for achieving reliable and scalable quantum computation. This seminar introduces the basic concepts of quantum error correction codes and their role in fault-tolerant universal quantum computing. We begin with a brief review of Dirac (bra–ket) notation to establish the language for describing quantum states and operations. We then present the construction of the Steane code as a representative Calderbank–Shor–Steane (CSS) code, illustrating how classical linear codes are used to protect quantum information. We next discuss the challenge of realizing universal quantum computation under fault-tolerant constraints, focusing on the limitations of transversal Clifford gates and the need for non-Clifford operations. This motivates the study of CSS-T codes, in particular triorothogonal codes that enable transversal T gates. The talk concludes with a short overview of open problems and current research directions in quantum error correction and fault-tolerant quantum computing.

For more information, please visit:

https://www.view.sdu.edu.cn/info/1020/209481.htm