Unknown

Dataset Information

0

Step-like dependence of memory function on pulse width in spintronics reservoir computing.


ABSTRACT: Physical reservoir computing is a type of recurrent neural network that applies the dynamical response from physical systems to information processing. However, the relation between computation performance and physical parameters/phenomena still remains unclear. This study reports our progress regarding the role of current-dependent magnetic damping in the computational performance of reservoir computing. The current-dependent relaxation dynamics of a magnetic vortex core results in an asymmetric memory function with respect to binary inputs. A fast relaxation caused by a large input leads to a fast fading of the input memory, whereas a slow relaxation by a small input enables the reservoir to keep the input memory for a relatively long time. As a result, a step-like dependence is found for the short-term memory and parity-check capacities on the pulse width of input data, where the capacities remain at 1.5 for a certain range of the pulse width, and drop to 1.0 for a long pulse-width limit. Both analytical and numerical analyses clarify that the step-like behavior can be attributed to the current-dependent relaxation time of the vortex core to a limit-cycle state.

SUBMITTER: Yamaguchi T 

PROVIDER: S-EPMC7659325 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

altmetric image

Publications

Step-like dependence of memory function on pulse width in spintronics reservoir computing.

Yamaguchi Terufumi T   Akashi Nozomi N   Nakajima Kohei K   Kubota Hitoshi H   Tsunegi Sumito S   Taniguchi Tomohiro T  

Scientific reports 20201111 1


Physical reservoir computing is a type of recurrent neural network that applies the dynamical response from physical systems to information processing. However, the relation between computation performance and physical parameters/phenomena still remains unclear. This study reports our progress regarding the role of current-dependent magnetic damping in the computational performance of reservoir computing. The current-dependent relaxation dynamics of a magnetic vortex core results in an asymmetri  ...[more]

Similar Datasets

| S-EPMC5579006 | biostudies-literature
| S-EPMC5081200 | biostudies-literature
| S-EPMC3286854 | biostudies-literature
| S-EPMC8455577 | biostudies-literature
| S-EPMC11319353 | biostudies-literature
| S-EPMC9710781 | biostudies-literature
| S-EPMC4002133 | biostudies-literature
| S-EPMC10275999 | biostudies-literature
| S-EPMC7676462 | biostudies-literature
| S-EPMC11006892 | biostudies-literature