New paper on arxiv today. Turns out relative expanders (important for preserving distance during surgery) are basically matrix realisations of linear PCPs of proximity: arxiv.org/abs/2609.26973
arxiv.org
Near-optimal high-rate surgery from linear PCPPs
A central problem for surgery with quantum Low-Density Parity Check (LDPC) codes is the design of auxiliary systems which measure large sets of logical operators in parallel, while preserving sparsity...
