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dc.identifier.uri Cramer, Marcus Plenio, Martin B. Flammia, Steven T. Somma, Rolando Gross, David Bartlett, Stephen D. Landon-Cardinal, Olivier Poulin, David Liu, Yi-Kai 2017-06-14T12:34:51Z 2017-06-14T12:34:51Z 2010
dc.identifier.citation Cramer, Marcus; Plenio, Martin B.; Flammia, Steven T.; Somma, Rolando; Gross, David et al.: Efficient quantum state tomography. In: Nature Communications 1 (2010), 149. DOI:
dc.description.abstract Quantum state tomography-deducing quantum states from measured data-is the gold standard for verification and benchmarking of quantum devices. It has been realized in systems with few components, but for larger systems it becomes unfeasible because the number of measurements and the amount of computation required to process them grows exponentially in the system size. Here, we present two tomography schemes that scale much more favourably than direct tomography with system size. One of them requires unitary operations on a constant number of subsystems, whereas the other requires only local measurements together with more elaborate post-processing. Both rely only on a linear number of experimental operations and post-processing that is polynomial in the system size. These schemes can be applied to a wide range of quantum states, in particular those that are well approximated by matrix product states. The accuracy of the reconstructed states can be rigorously certified without any a priori assumptions. eng
dc.description.sponsorship EU/Q-ESSENCE
dc.description.sponsorship Alexander von Humboldt Professorship
dc.description.sponsorship EU/STREP’s CORNER
dc.description.sponsorship EU/HIP
dc.description.sponsorship Australian Research Council
dc.description.sponsorship Perimeter Institute for Theoretical Physics
dc.language.iso eng
dc.publisher London : Nature Publishing Group
dc.relation.ispartofseries Nature Communications 1 (2010)
dc.rights CC BY 4.0 Unported
dc.subject density-matrix renormalization eng
dc.subject entanglement eng
dc.subject.ddc 500 | Naturwissenschaften ger
dc.title Efficient quantum state tomography
dc.type article
dc.type Text
dc.relation.issn 2041-1723
dc.bibliographicCitation.volume 1
dc.bibliographicCitation.firstPage 149
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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