Author

Yang Li

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Preprint Sep 2026

On the exact quantum chromatic number of generalized Johnson graphs

The quantum chromatic number is a fundamental parameter in the study of nonlocal games, capturing the extent to which entanglement can improve performance in distributed tasks. In this paper, we investigate the quantum chromatic number of generalized Johnson graphs. By constructing modulus-one orthogonal representation...

Gao-Jun Luo, Xi-Wang Cao, Shi-Tao Li et al. · 0 citations

Preprint Sep 2026

Subspace coverings and generalized covering radii of generalized Zetterberg codes

Generalized covering radii measure how many columns of a parity-check matrix are needed to generate several syndromes simultaneously. Their finite-geometric counterparts are $(\rho,t)$-saturating sets, for which every $t$-dimensional subspace is contained in a subspace generated by at most $\rho$ prescribed vectors. We...

Shi-Tao Li, Yang Li, Gao-Jun Luo et al. · 1 citation

Jul 2026

Entanglement-Assisted Quantum Locally Recoverable Codes: Characterizations, Bounds, and Constructions

This work introduces entanglement-assisted quantum locally recoverable codes (EAQLRCs) by assuming that halves of the pre-shared maximally entangled pairs are noiseless and establishes an upper bound on locality and a Singleton-like bound for arbitrary CSS-like EAQLRCs, and characterize the pure codes attaining equalit...

Yang Li, San Ling, Zhen-Liang Lu et al. · arXiv.org · 3 citations · ⚡1