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About this paper
Alireza Goldar, Zhen Qin, Zhihui Zhu, Zhe-Xuan Gong, Michael B. Wakin
The authors show adaptivity reduces copies needed to estimate a scalar in a structured quantum state, even against nonadaptive joint measurements within each copy. Early measurements identify a hidden label, directing later signal measurements. At fixed accuracy and marker strength, the protocol uses logarithmically many copies versus exponentially many; this result concerns the constructed family, not quantum learning generally.
Summary by alphaXiv.
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