Audio Classification with Skyrmion Reservoirs

Msiska, Robin; Love, Jake; Mulkers, Jeroen; Leliaert, Jonathan; Everschor-Sitte, Karin

doi:10.48550/arxiv.2209.13946

Cited by 2 publications

(3 citation statements)

References 34 publications

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“…Another approach to skyrmion RC is to use a skyrmion fabric instead of individual skyrmions. Bourianoff et al [88] proposed the use of a skyrmion fabric as an echo state machine, and [100,101] proposed the use of a skyrmion reservoir for more advanced applications, such as audio or spatial analysis. Compared to systems containing only isolated skyrmions, the skyrmion fabric results in a more random and complicated current flow and can be tuned by the external magnetic field (figure 6(c)).…”

Section: Skyrmion Reservoir Computingmentioning

confidence: 99%

Magnetic skyrmions and domain walls for logical and neuromorphic computing

Cui

Liu

et al. 2023

Neuromorph. Comput. Eng.

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Topological solitons are exciting candidates for the physical implementation of next-generation computing systems. As these solitons are nanoscale and can be controlled with minimal energy consumption, they are ideal to fulfill emerging needs for computing in the era of big data processing and storage. Magnetic domain walls and magnetic skyrmions are two types of topological solitons that are particularly exciting for next-generation computing systems in light of their non-volatility, scalability, rich physical interactions, and ability to exhibit non-linear behaviors. Here we summarize the development of computing systems based on magnetic topological solitons, highlighting logical and neuromorphic computing with magnetic domain walls and skyrmions.

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Section: Skyrmion Reservoir Computingmentioning

confidence: 99%

Magnetic skyrmions and domain walls for logical and neuromorphic computing

Cui

Liu

et al. 2023

Neuromorph. Comput. Eng.

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“…On the other hand, in Brownian reservoir computing, skyrmion diffusion serves as automatic reset mechanism and is necessary to overcome device imperfections. Even though skyrmion diffusion on the reported time scales [6] has recently been experimentally demonstrated to successfully enable Brownian reservoir computing, [34] a faster operation of such device or especially the processing input signals on shorter time scales such as the newly proposed audio recognition [36] is only enabled by higher skyrmion diffusion speeds. Unless strongly driven, the skyrmion dynamics have been found to be heavily impacted by size-dependent pinning effects which induce a non-flat effective energy landscape.…”

Section: Introductionmentioning

confidence: 99%

“…Skyrmions are chiral magnetic structures [1][2][3][4] that are of major scientific interest as they are promising candidates for various such devices or especially processing input signals on shorter time scales-such as for the newly proposed audio recognition [36] -is only enabled by higher skyrmion diffusion speeds. Unless strongly driven, the skyrmion dynamics has been found to be heavily impacted by size-dependent pinning effects that induce a non-flat effective energy landscape.…”

Section: Introductionmentioning

confidence: 99%

300‐Times‐Increased Diffusive Skyrmion Dynamics and Effective Pinning Reduction by Periodic Field Excitation

et al. 2023

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Thermally induced skyrmion dynamics as well as skyrmion pinning effects in thin films have attracted significant interest. While pinning poses challenges in deterministic skyrmion devices and slows down skyrmion diffusion, for applications in non-conventional computing, both pinning of an appropriate strength and skyrmion diffusion speed are key. Here, we employ periodic field excitations to realize an increase of the skyrmion diffusion by more than two orders of magnitude. Amplifying the excitation, we report a drastic reduction of the effective skyrmion pinning and observe a transition from pinning-dominated diffusive hopping to dynamics approaching free diffusion. By tailoring the field oscillation frequency and amplitude, we demonstrate continuous tuning of the effective pinning and skyrmion dynamics, which is a key asset and enabler for nonconventional computing applications. We find that the periodic excitations additionally allow us to stabilize skyrmions at different sizes for field values that are inaccessible in static systems, opening up new approaches to ultra-fast skyrmion motion by transiently exciting moving skyrmions.Received: ((will be filled in by the editorial staff))Revised: ((will be filled in by the editorial staff))

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Audio Classification with Skyrmion Reservoirs

Cited by 2 publications

References 34 publications

Magnetic skyrmions and domain walls for logical and neuromorphic computing

Magnetic skyrmions and domain walls for logical and neuromorphic computing

300‐Times‐Increased Diffusive Skyrmion Dynamics and Effective Pinning Reduction by Periodic Field Excitation

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