Designing XY and Dzyaloshinskii--Moriya couplings in Majorana Cooper pair boxes
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911481889554432 |
|---|---|
| author | Teranishi, Manato Hoshino, Shintaro Yamakage, Ai |
| author_facet | Teranishi, Manato Hoshino, Shintaro Yamakage, Ai |
| contents | We theoretically study how to design spin couplings in networks of Majorana Cooper pair boxes (MCBs) connected by multiple normal-metal leads. The inter-box interaction is generated by the conduction-electron-mediated Ruderman--Kittel--Kasuya--Yosida (RKKY) interaction. We show that the connectivity of Majoranas to the leads enables arbitrary types of couplings. As concrete examples, we show the realization of the XY exchange interaction and the Dzyaloshinskii--Moriya (DM) interaction, which are difficult to implement in previously proposed MCB-based schemes. The sign and magnitude of the couplings can be tuned continuously via gate-controlled tunneling amplitudes. These results establish MCBs as a versatile platform for engineered quantum spin systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_02713 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Designing XY and Dzyaloshinskii--Moriya couplings in Majorana Cooper pair boxes Teranishi, Manato Hoshino, Shintaro Yamakage, Ai Mesoscale and Nanoscale Physics We theoretically study how to design spin couplings in networks of Majorana Cooper pair boxes (MCBs) connected by multiple normal-metal leads. The inter-box interaction is generated by the conduction-electron-mediated Ruderman--Kittel--Kasuya--Yosida (RKKY) interaction. We show that the connectivity of Majoranas to the leads enables arbitrary types of couplings. As concrete examples, we show the realization of the XY exchange interaction and the Dzyaloshinskii--Moriya (DM) interaction, which are difficult to implement in previously proposed MCB-based schemes. The sign and magnitude of the couplings can be tuned continuously via gate-controlled tunneling amplitudes. These results establish MCBs as a versatile platform for engineered quantum spin systems. |
| title | Designing XY and Dzyaloshinskii--Moriya couplings in Majorana Cooper pair boxes |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2603.02713 |