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quant-ph2026
Space-sharing and Singleton Bounds for Entanglement-assisted Classical Coding
Yuhang Yao, Tushita Prasad, Markus Grassl +2
Recent work has noted that a space-sharing argument proves the tightness of the entropic quantum Singleton bounds, which was left open in the literature for various settings involv…
quant-ph2025
A Conjecture on Almost Flat SIC-POVMs
Ingemar Bengtsson, Markus Grassl
A well supported conjecture states that SIC-POVMs -- maximal sets of complex equiangular lines -- with anti-unitary symmetry give rise to an identity expressing some of its overlap…
quant-ph2009★ 274 cited
SIC-POVMs: A new computer study
A. J. Scott, M. Grassl
We report on a new computer study into the existence of d^2 equiangular lines in d complex dimensions. Such maximal complex projective codes are conjectured to exist in all finite…