Reproduce “Exponential T-Count Hardness and Stabilizer Rank from Syndrome Decoding” on OpenResearch

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About this paper

Yan Ru Pei

The authors reduce syndrome decoding to strong simulation of Clifford+T circuit amplitudes, encoding the code’s linear structure in Clifford gates and testing error weight with T gates. Each of at most N+1 adaptive queries uses 8A(N) T gates. The reduction is unconditional; under exponential decoding hardness, it rules out simulators with runtime 2^(αt) poly(g) when α<δ/8.

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