Device-independent tomography of multipartite quantum states

K. Pál, T. Vértesi, Miguel Navascués

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

In the usual tomography of multipartite entangled quantum states one assumes that the measurement devices used in the laboratory are under perfect control of the experimenter. In this paper, using the so-called swap concept introduced recently, we show how one can remove this assumption in realistic experimental conditions and nevertheless be able to characterize the produced multipartite state based only on observed statistics. Such a black-box tomography of quantum states is termed self-testing. As a function of the magnitude of the Bell violation, we are able to self-test emblematic multipartite quantum states such as the three-qubit W state, the three- and four-qubit Greenberger-Horne-Zeilinger states, and the four-qubit linear cluster state.

Original languageEnglish
Article number042340
JournalPhysical Review A
Volume90
Issue number4
DOIs
Publication statusPublished - Oct 31 2014

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tomography
self tests
bells
boxes
statistics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Device-independent tomography of multipartite quantum states. / Pál, K.; Vértesi, T.; Navascués, Miguel.

In: Physical Review A, Vol. 90, No. 4, 042340, 31.10.2014.

Research output: Contribution to journalArticle

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