Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 168

The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.

Experimental Greenberger–Horne–Zeilinger entanglement beyond qubits

Open access
Erhard, Manuel, Malik, Mehul, Krenn, Mario, Zeilinger, Anton·2018·Nature Photonics

Abstract

The Greenberger-Horne-Zeilinger (GHZ) argument provides an all-or-nothing contradiction between quantum mechanics and local-realistic theories. In its original formulation, GHZ investigated three and four particles entangled in two dimensions only. Very recently, higher dimensional contradictions especially in three dimensions and three particles have been discovered but it has remained unclear how to produce such states. In this article we experimentally show how to generate a three-dimensional GHZ state from two-photon orbital-angular-momentum entanglement. The first suggestion for a setup which generates three-dimensional GHZ entanglement from these entangled pairs came from using the computer algorithm MELVIN. The procedure employs novel concepts significantly beyond the qubit case. Our experiment opens up the possibility of a truly high-dimensional test of the GHZ-contradiction which, interestingly, employs non-Hermitian operators.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1038/s41566-018-0257-6

Cites

11 of 11 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 11 references

Cited by

See all 168

Metadata

Authors
Erhard, M., Malik, M., Krenn, M., & Zeilinger, A.
Venue
Nature Photonics
Published
2018-10-29
Volume
12
Issue
12
Pages
759-764
ISSN
  • 1749-4885 (ISSN-L)
  • 1749-4893
OpenAlex
W2748190745
Cited by
168
References
11
FWCI
8.49
Type
journal article
Language
en
Open access
green

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Experimental Greenberger–Horne–Zeilinger entanglement beyond qubits. https://app.cochat.ai/papers/10.1038/s41566-018-0257-6
The paper
Erhard, M., Malik, M., Krenn, M., & Zeilinger, A. (2018). Experimental Greenberger–Horne–Zeilinger entanglement beyond qubits. Nature Photonics. https://doi.org/10.1038/s41566-018-0257-6

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.