Training coupled phase oscillators as a neuromorphic platform using equilibrium propagation

被引:0
作者
Wang, Qingshan [1 ]
Wanjura, Clara C. [1 ]
Marquardt, Florian [1 ,2 ]
机构
[1] Max Planck Inst Sci Light, Staudtstr 2, D-91058 Erlangen, Germany
[2] Univ Erlangen Nurnberg, Dept Phys, D-91058 Erlangen, Germany
来源
NEUROMORPHIC COMPUTING AND ENGINEERING | 2024年 / 4卷 / 03期
关键词
XY model; equilibrium propagation; physics-based training; NEURAL-NETWORKS; SYNCHRONIZATION; BACKPROPAGATION; MODELS;
D O I
10.1088/2634-4386/ad752b
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Given the rapidly growing scale and resource requirements of machine learning applications, the idea of building more efficient learning machines much closer to the laws of physics is an attractive proposition. One central question for identifying promising candidates for such neuromorphic platforms is whether not only inference but also training can exploit the physical dynamics. In this work, we show that it is possible to successfully train a system of coupled phase oscillators-one of the most widely investigated nonlinear dynamical systems with a multitude of physical implementations, comprising laser arrays, coupled mechanical limit cycles, superfluids, and exciton-polaritons. To this end, we apply the approach of equilibrium propagation, which permits to extract training gradients via a physical realization of backpropagation, based only on local interactions. The complex energy landscape of the XY/Kuramoto model leads to multistability, and we show how to address this challenge. Our study identifies coupled phase oscillators as a new general-purpose neuromorphic platform and opens the door towards future experimental implementations.
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收藏
页数:19
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