Robust self-testing of nonmaximal entanglement from a reduced inner product game
Published in arXiv preprint, 2026
This work reduces Lalonde’s pseudo-telepathy inner product game from six dimensions to five while retaining four questions for Alice and three for Bob, with five possible answers per question. The resulting game robustly self-tests a nonmaximally entangled state together with all 35 measurement effects. It also shows that no maximally entangled state of any finite dimension can win the game perfectly.