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- W3160402456 abstract "Recently introduced shadow tomography protocols use classical shadows of quantum states to predict many target functions of an unknown quantum state. Unlike full quantum state tomography, shadow tomography does not insist on accurate recovery of the density matrix for high rank mixed states. Yet, such a protocol makes multiple accurate predictions with high confidence, based on a moderate number of quantum measurements. One particular influential algorithm, proposed by Huang, Kueng, and Preskill arXiv:2002.08953, requires additional circuits for performing certain random unitary transformations. In this paper, we avoid these transformations but employ an arbitrary informationally complete POVM and show that such a procedure can compute k-bit correlation functions for quantum states reliably. We also show that, for this application, we do not need the median of means procedure of Huang et al. Finally, we discuss the contrast between the computation of correlation functions and fidelity of reconstruction of low rank density matrices." @default.
- W3160402456 created "2021-05-24" @default.
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- W3160402456 date "2021-05-12" @default.
- W3160402456 modified "2023-09-23" @default.
- W3160402456 title "Informationally complete POVM-based shadow tomography" @default.
- W3160402456 hasPublicationYear "2021" @default.
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