Tight Lower Bounds for State Tomography with Limited Entanglement
We study state tomography when each measurement acts on at most $k$ fresh copies and no quantum memory is retained between blocks. We prove a lower bound matching the upper bound in [arXiv:2510.07788]. Thus the copy complexity of estimating an arbitrary $d$-dimensional state to trace distance $\epsilon$ is, up to absol...
U. Keskin, Jason Luo, Mahbod Majid et al.
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