Primary paper: arxiv.org/abs/2011.10928 . doi.org/10.1126/sciadv.abg2879 . Science Advances7,eabg2879(2021); preprint2020. Original full byline at archive: Yair Margalit and10coauthors. Cited abstract and experimental description: atom-chip magnetic gradients, spin-dependent splitting and coherent full-loop recombination. No claim of the original macroscopic-magnet scheme having been realized is made.