Periodic structure of memory function in spintronics reservoir with feedback current
Periodic structure of memory function in spintronics reservoir with feedback current
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反馈电流自旋电子学储层记忆函数的周期结构
DOI:
10.1103/physrevresearch.2.023389
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
T. Taniguchi
中科院分区:
文献类型:
--
作者:
Terufumi Yamaguchi;Nozomi Akashi;S. Tsunegi;H. Kubota;K. Nakajima;T. Taniguchi
The role of the feedback effect on physical reservoir computing is studied theoretically by solving the vortex-core dynamics in a nanostructured ferromagnet. Although the spin-transfer torque due to the feedback current makes the vortex dynamics complex, it is clarified that the feedback effect does not always contribute to the enhancement of the memory function in a physical reservoir. The memory function, characterized by the correlation coefficient between the input data and the dynamical response of the vortex core, becomes large when the delay time of the feedback current is not an integral multiple of the pulse width. On the other hand, the memory function remains small when the delay time is an integral multiple of the pulse width. As a result, a periodic behavior for the short-term memory capacity is observed with respect to the delay time, the phenomenon of which can be attributed to correlations between the virtual neurons via the feedback current.
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DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
S. Tsunegi;T. Taniguchi;K. Nakajima;S. Miwa;K. Yakushiji;A. Fukushima;and H. Kubota
通讯作者:
and H. Kubota
影响因子:
1.5
作者:
S. Tsunegi;T. Taniguchi;S. Miwa;K. Nakajima;K. Yakushiji;A. Fukushima;S. Yuasa;H. Kubota
通讯作者:
H. Kubota
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
S. Fukami;W. A. Borders;A. Kurenkov;C. Zhang;S. DuttaGupta;and H. Ohno
通讯作者:
and H. Ohno
影响因子:
64.8
作者:
Borders, William A.;Pervaiz, Ahmed Z.;Datta, Supriyo
通讯作者:
Datta, Supriyo