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papersSEP 10 04:00 UTC

Optimal sample complexity for low-rank quantum state tomography with joint measurements

A new paper determines the optimal sample complexity for estimating an unknown low-rank quantum state when each measurement can act jointly on at most t copies. The results characterize how the state's rank and dimension shape the number of samples needed to reach a target error in this bounded-measurement setting.

quantum/research/tomography/sample-complexity