Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 304

The DOI matches its Crossref record; 23 of the 23 references it cites were found in a registry or an index.

Emulation of a Quantum Spin with a Superconducting Phase Qudit

Neeley, Matthew, Ansmann, Markus, Bialczak, Radoslaw C., Hofheinz, Max, Lucero, Erik, O'Connell, Aaron D., Sank, Daniel, Wang, Haohua, Wenner, James, Cleland, Andrew N., Geller, Michael R., Martinis, John M.·2009·Science

Abstract

Higher-Level Quantum Emulation: At the heart of a quantum computer is the device on which information is to be encoded. This is typically done with a qubit, a two-level quantum system analogous to the two-level bit that encodes 0 and 1 in classical computers. However, there need not be just two quantum energy levels. There could be three (a qutrit), or more generally, d -levels (a qudit) in the device. Neeley et al. (p. 722 ; see the Perspective by Nori ) demonstrate a five-level quantum device and show that their qudit can be used to emulate the processes involved in manipulating quantum spin. The use of multilevel qudits may also have potential in quantum information processing by simplifying certain computational tasks and simplifying the circuitry required to realize the quantum computer itself.

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 · 10.1126/science.1173440

Cites

23 of 23 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 23 references

Cited by

See all 304

Metadata

Authors
Neeley, M., Ansmann, M., Bialczak, R. C., Hofheinz, M., Lucero, E., O'Connell, A. D., Sank, D., Wang, H., Wenner, J., Cleland, A. N., Geller, M. R., & Martinis, J. M.
Venue
Science
Published
2009-08-07
Volume
325
Issue
5941
Pages
722-725
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2135010009
Cited by
304
References
23
FWCI
16.99
Type
journal article
Language
en
Open access
closed

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: Emulation of a Quantum Spin with a Superconducting Phase Qudit. https://app.cochat.ai/papers/10.1126/science.1173440
The paper
Neeley, M., Ansmann, M., Bialczak, R. C., Hofheinz, M., Lucero, E., O'Connell, A. D., Sank, D., Wang, H., Wenner, J., Cleland, A. N., Geller, M. R., & Martinis, J. M. (2009). Emulation of a Quantum Spin with a Superconducting Phase Qudit. Science. https://doi.org/10.1126/science.1173440

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.