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Cited by 462

The DOI matches its Crossref record; 43 of the 43 references it cites were found in a registry or an index.

Quantum discord as resource for remote state preparation

Open access
Dakić, Borivoje, Lipp, Yannick Ole, Ma, Xiaosong, Ringbauer, Martin, Kropatschek, Sebastian, Barz, Stefanie, Paterek, Tomasz, Vedral, Vlatko, Zeilinger, Anton, Brukner, Časlav, Walther, Philip·2012·Nature Physics
DOI 10.1038/nphys2377
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Abstract

The existence of better-than-classical quantum information processing (QIP) models which consume very little or no entanglement suggests that separable or weakly entangled states could be extremely useful tools for information processing as they are much easier to prepare and control even in dissipative environments. It has been proposed that a resource of advantage is the generation of quantum discord, a measure of non-classical correlations that includes entanglement as a subset. Here we show that quantum discord is the necessary resource for quantum remote state preparation. We explicitly show that the geometric measure of quantum discord is related to the fidelity of this task, which provides its operational meaning. Our results are experimentally demonstrated using photonic quantum systems. Moreover, we demonstrate that separable states with non-zero quantum discord can outperform entangled states. Therefore, the role of quantum discord might provide fundamental insights for resource-efficient QIP. Quantum discord is the total non-classical correlation between two systems. This includes, but is not limited to, entanglement. Photonic experiments now demonstrate that separable states with non-zero quantum discord are a useful resource for quantum information processing and can even outperform entangled states.

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Metadata

Authors
Dakić, B., Lipp, Y. O., Ma, X., Ringbauer, M., Kropatschek, S., Barz, S., Paterek, T., Vedral, V., Zeilinger, A., Brukner, Č., & Walther, P.
Venue
Nature Physics
Publisher
Springer Science and Business Media LLC
Published
2012-08-05
Volume
8
Issue
9
Pages
666-670
ISSN
  • 1745-2473 (ISSN-L)
  • 1745-2481
DOI
10.1038/nphys2377
OpenAlex
W2035247062
Cited by
462
References
43
FWCI
55.73
Type
journal article
Language
en
Open access
green

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