SciPost Submission Page
Generating long-distance magnetic couplings with flat bands
by Georges Bouzerar, Maxime Thumin
Submission summary
| Authors (as registered SciPost users): | Georges Bouzerar · Maxime Thumin |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202505_00026v1 (pdf) |
| Date accepted: | June 12, 2025 |
| Date submitted: | May 13, 2025, 2:21 p.m. |
| Submitted by: | Bouzerar, Georges |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
One of the great challenges for the large-scale development of quantum technologies is to generate and control the entanglement of quantum bits through interactions of sufficiently long range. Two decades ago, spin chains have been proposed for quantum communication. Unfortunately, couplings are of very short range in general which drastically limits the communication to very short distances. Here, we demonstrate that the presence of flat bands (FBs) can trigger very long-distance magnetic couplings in spin chains. Furthermore, we show that the typical decaying lengthscale is directly related to the quantum metric of the flat band eigenstates. We believe that our unexpected findings could open up an alternative route to enable long-distance quantum communication.
Author indications on fulfilling journal expectations
- Provide a novel and synergetic link between different research areas.
- Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work
- Detail a groundbreaking theoretical/experimental/computational discovery
- Present a breakthrough on a previously-identified and long-standing research stumbling block
Author comments upon resubmission
We resubmit a single .pdf file that contains both (1) the novel (modified) version of our manuscript and (2) the detailed response to the referees.
Sincerely yours,
G. Bouzerar and M. Thumin.
List of changes
In the new version of the manuscript all the added sentences (according to the referees remarks and comments) are highlighted in blue in the pdf file of the article. More precisely :
1- We have added two references (referee request)
2-A novel paragraph to address the effect of breaking the flatness of the band.
3-A new figure is added in the main text (fig.6) with the corresponding discussion.
4-We have removed the supplementary material which corresponds now to a set of Appendices (A,B and C).
5-A new figure is added in the Appendix A with the corresponding discussion.
Current status:
Editorial decision:
For Journal SciPost Physics: Publish
(status: Editorial decision fixed and (if required) accepted by authors)
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