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  1. Agrawal, Shipra ; Roth, Aaron (Ed.)
    Free, publicly-accessible full text available August 8, 2025
  2. Agrawal, Shipra ; Roth, Aaron (Ed.)
    Free, publicly-accessible full text available July 3, 2025
  3. Agrawal, Shipra ; Roth, Aaron (Ed.)
    Free, publicly-accessible full text available July 3, 2025
  4. Agrawal, Shipra ; Roth, Aaron (Ed.)
    We study quantum state certification using unentangled quantum measurements, namely measurements which operate only on one copy of the state at a time. When there is a common source of randomness available and the unentangled measurements are chosen based on this randomness, prior work has shown that copies are necessary and sufficient. We show a separation between algorithms with and without randomness. We develop a lower bound framework for both fixed and randomized measurements that relates the hardness of testing to the well-established Lüders rule. More precisely, we obtain lower bounds for randomized and fixed schemes as a function of the eigenvalues of the Lüders channel which characterizes one possible post-measurement state transformation. 
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    Free, publicly-accessible full text available June 30, 2025