Student or educator? Sign up with your school email and get 6 months of Pro free.
CoChat
Sign Up
Cited by 364

The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.

Diverging Entanglement Length in Gapped Quantum Spin Systems

Open access
Verstraete, F., Martín-Delgado, M. A., Cirac, J. I.·2004·Physical Review Letters
DOI 10.1103/physrevlett.92.087201
Open this paper in CoChat — free account

Abstract

We prove the existence of gapped quantum Hamiltonians whose ground states exhibit an infinite entanglement length, as opposed to their finite correlation length. Using the concept of entanglement swapping, the localizable entanglement is calculated exactly for valence bond and finitely correlated states, and the existence of the so-called string-order parameter is discussed. We also report on evidence that the ground state of an antiferromagnetic chain can be used as a perfect quantum channel if local measurements on the individual spins can be implemented.

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 · 10.1103/physrevlett.92.087201

Cites

5 of 5 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 5 references

Cited by

See all 364

Metadata

Authors
Verstraete, F., Martín-Delgado, M. A., & Cirac, J. I.
Venue
Physical Review Letters
Publisher
American Physical Society (APS)
Published
2004-02-23
Volume
92
Issue
8
Pages
087201-087201
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
DOI
10.1103/physrevlett.92.087201
OpenAlex
W2024420461
Cited by
364
References
5
FWCI
32.15
Type
journal article
Language
en
Open access
bronze

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: Diverging Entanglement Length in Gapped Quantum Spin Systems. https://app.cochat.ai/papers/10.1103/physrevlett.92.087201
The paper
Verstraete, F., Martín-Delgado, M. A., & Cirac, J. I. (2004). Diverging Entanglement Length in Gapped Quantum Spin Systems. Physical Review Letters. https://doi.org/10.1103/physrevlett.92.087201

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.