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quant-ph2026
Phantom Codes: Hardness, Rate Optimal qLDPC Constructions, and Distance Limits
Rui Mao, Weixiao Sun, Shengyu Zhang
An stabilizer code is phantom if every in-block logical CNOT gate can be realized by a permutation of its physical qubits. This eliminates the large and complicated phy…
quant-ph2025
QAOA-MaxCut has barren plateaus for almost all graphs
Rui Mao, Pei Yuan, Jonathan Allcock +1
The QAOA has been the subject of intense study over recent years, yet the corresponding Dynamical Lie Algebra (DLA)--a key indicator of the expressivity and trainability of VQAs--r…