Multi-value Probabilistic Computing with current-controlled Skyrmion Diffusion
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909755218329600 |
|---|---|
| author | Winkler, Thomas B. Zhou, Yuean Beneke, Grischa Kammerbauer, Fabian Krishnia, Sachin Carpentieri, Mario Rodrigues, Davi R. Kläui, Mathias Mentink, Johan H. |
| author_facet | Winkler, Thomas B. Zhou, Yuean Beneke, Grischa Kammerbauer, Fabian Krishnia, Sachin Carpentieri, Mario Rodrigues, Davi R. Kläui, Mathias Mentink, Johan H. |
| contents | Magnetic systems are highly promising for implementing probabilistic computing paradigms because of the fitting energy scales and conspicuous non-linearities. While conventional binary probabilistic computing has been realized, implementing more advantageous multi-value probabilistic computing (MPC) remains a challenge. Here, we report the realization of MPC by leveraging the thermally activated diffusion of magnetic skyrmions through an effectively non-flat energy landscape defined by a discrete number of pinning sites. The time-averaged spatial distribution of the diffusing skyrmions directly realizes a discrete probability distribution, which is tunable by current-generated spin-orbit torques, and can be quantified by non-perturbative electrical measurements. Even a very straightforward implementation with global tuning, already allows us to demonstrate the softmax computation - a core function in artificial intelligence. As a key advance, we demonstrate invertible logic without the need to create a network of probabilistic devices, offering major scalability advantages. Our proof of concept can be generalized to multiple skyrmions and can accommodate multiple locally tunable inputs and outputs using magnetic tunnel junctions, potentially enabling the representation of highly complex distribution functions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_19623 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multi-value Probabilistic Computing with current-controlled Skyrmion Diffusion Winkler, Thomas B. Zhou, Yuean Beneke, Grischa Kammerbauer, Fabian Krishnia, Sachin Carpentieri, Mario Rodrigues, Davi R. Kläui, Mathias Mentink, Johan H. Materials Science Disordered Systems and Neural Networks Magnetic systems are highly promising for implementing probabilistic computing paradigms because of the fitting energy scales and conspicuous non-linearities. While conventional binary probabilistic computing has been realized, implementing more advantageous multi-value probabilistic computing (MPC) remains a challenge. Here, we report the realization of MPC by leveraging the thermally activated diffusion of magnetic skyrmions through an effectively non-flat energy landscape defined by a discrete number of pinning sites. The time-averaged spatial distribution of the diffusing skyrmions directly realizes a discrete probability distribution, which is tunable by current-generated spin-orbit torques, and can be quantified by non-perturbative electrical measurements. Even a very straightforward implementation with global tuning, already allows us to demonstrate the softmax computation - a core function in artificial intelligence. As a key advance, we demonstrate invertible logic without the need to create a network of probabilistic devices, offering major scalability advantages. Our proof of concept can be generalized to multiple skyrmions and can accommodate multiple locally tunable inputs and outputs using magnetic tunnel junctions, potentially enabling the representation of highly complex distribution functions. |
| title | Multi-value Probabilistic Computing with current-controlled Skyrmion Diffusion |
| topic | Materials Science Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2508.19623 |