| 公告主旨 |
【Joint CQSE & NCTS Seminar】2026-07-31 Coupled-Layer Construction of Quantum Product Codes |
| 公告內容 |
Time: July 31, 14:30 ~ 15:30
Title: Coupled-Layer Construction of Quantum Product Codes
Speaker: Prof. Tzu-Chieh Wei （Department of Physics and Astronomy, Stony Brook University）
Place: NCTS Physics Lecture Hall, 4F, Chee-Chun Leung Cosmology Hall, NTU
Online Link:
https://nationaltaiwanuniversity-zbh.my.webex.com/nationaltaiwanuniversity-zbh.my/j.php?MTID=mfefdb03bf937d423c06d1c0312c9bd9c
Abstract:
Product codes are a class of quantum error correcting codes built from two or more constituent codes. They have recently gained prominence for a breakthrough yielding quantum low-density parity-check （qLDPC） codes with favorable scaling of both code distance and encoding rate. However, despite its powerful algebraic formulation, the physical mechanism for assembling a general product code from its constituents remains unclear. In this work, we show that the tensor and balanced product codes admit an intuitive coupled-layer construction by taking a stack of one code and condensing a set of excitations in the pattern given by the checks of the other code. Our framework accommodates both classical or quantum CSS input codes, unifies known physical mechanisms for constructing higher dimensional topological phases via anyon condensation, and naturally extends to non-topological codes.
Work in collaboration with Shuyu Zhang and Nathanan Tantivasadakarn, arxiv:2603.08711
Bio:
Tzu-Chieh Wei received his B.A. and M.Sc. in physics from National Taiwan University before the millennium. He earned his PhD degree in physics from the University of Illinois in 2004. Afterwards, he held postdoctoral and research associate positions at the University of Illinois, the University of Waterloo （in their Institute for Quantum Computing）, and the University of British Columbia. In 2011, he joined the faculty of the C. N. Yang Institute and Department of Physics and Astronomy at Stony Brook University.
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