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 |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2502.20015v1 (pdf) |
| Date submitted: | 2025-03-05 11:30 |
| 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