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Quantum Foundations

Device-independent tomography of multipartite quantum states

arXiv

Authors: Karoly F. Pal, Tamas Vertesi, Miguel Navascues

Year

2014

Paper ID

8172

Status

Preprint

Abstract Read

~2 min

Abstract Words

111

Citations

N/A

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.

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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.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1407.5911 [2] arXiv https://arxiv.org/abs/1407.5911 [3] Publisher https://arxiv.org/abs/1407.5911

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