Resolves a decade-old question about quantum uniformity measures: ∥·∥Q4 are norms, but the triangle inequality fails for all k≥5. Advances fault-tolerant quantum computation theory.
@informaq.bsky.social
@informaq.bsky.socialResolves a decade-old question about quantum uniformity measures: ∥·∥Q4 are norms, but the triangle inequality fails for all k≥5. Advances fault-tolerant quantum computation theory.
@informaq.bsky.socialNew proof establishes the existence of ghost r-SICs—equichordal subspace configurations—by extending the twisted convolution identity to rank-r structures using finite quantum dilogarithm theory.