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Journal articles on the topic 'Spin wave computing'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Mahmoud, Abdulqader, Florin Ciubotaru, Frederic Vanderveken, et al. "Introduction to spin wave computing." Journal of Applied Physics 128, no. 16 (2020): 161101. http://dx.doi.org/10.1063/5.0019328.

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2

Schulz, Frank, Felix Groß, Johannes Förster, et al. "Realization of a magnonic analog adder with frequency-division multiplexing." AIP Advances 13, no. 1 (2023): 015115. http://dx.doi.org/10.1063/5.0120826.

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Being able to accurately control the interaction of spin waves is a crucial challenge for magnonics in order to offer an alternative wave-based computing scheme for certain technological applications. Especially in neural networks and neuromorphic computing, wave-based approaches can offer significant advantages over traditional CMOS-based binary computing schemes with regard to performance and power consumption. In this work, we demonstrate precise modulation of phase- and amplitude-sensitive interference of coherent spin waves in a yttrium–iron–garnet based magnonic analog adder device, whil

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3

Lucassen, Juriaan, Mark J. G. Peeters, Casper F. Schippers, et al. "Optical spin-wave detection beyond the diffraction limit." Journal of Applied Physics 133, no. 5 (2023): 053902. http://dx.doi.org/10.1063/5.0131736.

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Spin waves are proposed as information carriers for next-generation computing devices because of their low power consumption. Moreover, their wave-like nature allows for novel computing paradigms. Conventional methods to detect propagating spin waves are based either on electrical induction, limiting the downscaling and efficiency complicating eventual implementation, or on light scattering, where the minimum detectable spin-wave wavelength is set by the wavelength of the laser unless near-field techniques are used. In this article, we demonstrate the magneto-optical detection of spin waves be

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4

Geilen, Moritz, Alexandra Nicoloiu, Daniele Narducci, et al. "Fully resonant magneto-elastic spin-wave excitation by surface acoustic waves under conservation of energy and linear momentum." Applied Physics Letters 120, no. 24 (2022): 242404. http://dx.doi.org/10.1063/5.0088924.

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We report on the resonant excitation of spin waves in micro-structured magnetic thin films by short-wavelength surface acoustic waves (SAWs). The spin waves as well as the acoustic waves are studied by micro-focused Brillouin light scattering spectroscopy. At low magnetic bias fields, a resonant phonon–magnon conversion is possible, which results in the excitation of short-wavelength spin waves. Using micromagnetic simulations, we verify that during this excitation both energy and linear momentum are conserved and fully transferred from the SAW to the spin wave. This conversion can already be

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5

Talmelli, Giacomo, Thibaut Devolder, Nick Träger, et al. "Reconfigurable submicrometer spin-wave majority gate with electrical transducers." Science Advances 6, no. 51 (2020): eabb4042. http://dx.doi.org/10.1126/sciadv.abb4042.

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Spin waves are excitations in ferromagnetic media that have been proposed as information carriers in hybrid spintronic devices with much lower operation power than conventional charge-based electronics. Their wave nature can be exploited in majority gates by using interference for computation. However, a scalable spin-wave majority gate that can be cointegrated alongside conventional electronics is still lacking. Here, we demonstrate a submicrometer inline spin-wave majority gate with fan-out. Time-resolved imaging of the magnetization dynamics by scanning transmission x-ray microscopy illustr

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6

Chen, Jiaxuan, Ryosho Nakane, Gouhei Tanaka, and Akira Hirose. "Film-penetrating transducers applicable to on-chip reservoir computing with spin waves." Journal of Applied Physics 132, no. 12 (2022): 123902. http://dx.doi.org/10.1063/5.0102974.

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We have proposed a spin-wave transducer structure named film-penetrating transducers (FPTs). FPTs penetrate an on-chip magnetic film for a spin-wave transmission medium and allow flexible spatial arrangements of many exciters/detectors due to their zero-dimensional feature. We constructed four device models with different spatial arrangements of FPT/conventional exciters using a 10-nm-thick ferrimagnetic garnet film with a central FPT detector. We performed numerical experiments that combine electromagnetics with micromagnetics including thermal noise at 300 K. We evaluated important device fe

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Rivkin, Kirill, and Michael Montemorra. "Spin wave computing using pre-recorded magnetization patterns." Journal of Applied Physics 132, no. 15 (2022): 153902. http://dx.doi.org/10.1063/5.0096192.

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We propose a novel type of spin wave computing device, based on a bilayer structure that includes a “bias layer” made from a hard magnetic material and a “propagation layer” made from a magnetic material with low damping, for example, yttrium garnet or permalloy. The bias layer maintains a stable pre-recorded magnetization pattern, which generates a bias field with a desired spatial dependence, which in turn sets the equilibrium magnetization inside the propagation layer. When an external source applies an RF field to the propagation layer, excited spin waves scatter on the magnetization's inh

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8

Csaba, G., A. Papp, and W. Porod. "Spin-wave based realization of optical computing primitives." Journal of Applied Physics 115, no. 17 (2014): 17C741. http://dx.doi.org/10.1063/1.4868921.

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9

SHABADI, PRASAD, SANKARA NARAYANAN RAJAPANDIAN, SANTOSH KHASANVIS, and CSABA ANDRAS MORITZ. "DESIGN OF SPIN WAVE FUNCTIONS-BASED LOGIC CIRCUITS." SPIN 02, no. 03 (2012): 1240006. http://dx.doi.org/10.1142/s2010324712400061.

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Over the past few years, several novel nanoscale computing concepts have been proposed as potential post-complementary metal oxide semiconductor (CMOS) computing fabrics. In these, key focus is on inventing a faster and lower power alternative to conventional metal oxide semiconductor field effect transators. Instead, we propose a fundamental shift in mindset towards more functional building blocks, replacing simple switches with more sophisticated information encoding and computing based on alternate state variables to achieve a significantly more efficient and compact logic. Specifically, we

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10

Fulara, H., M. Zahedinejad, R. Khymyn, et al. "Spin-orbit torque–driven propagating spin waves." Science Advances 5, no. 9 (2019): eaax8467. http://dx.doi.org/10.1126/sciadv.aax8467.

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Spin-orbit torque (SOT) can drive sustained spin wave (SW) auto-oscillations in a class of emerging microwave devices known as spin Hall nano-oscillators (SHNOs), which have highly nonlinear properties governing robust mutual synchronization at frequencies directly amenable to high-speed neuromorphic computing. However, all demonstrations have relied on localized SW modes interacting through dipolar coupling and/or direct exchange. As nanomagnonics requires propagating SWs for data transfer and additional computational functionality can be achieved using SW interference, SOT-driven propagating

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11

LI, JIABO, BRIAN J. DUKE, THOMAS M. KLAPÖTKE, and ROY MCWEENY. "SPIN DENSITY OF SPIN-FREE VALENCE BOND WAVE FUNCTIONS AND ITS IMPLEMENTATION IN VB2000." Journal of Theoretical and Computational Chemistry 07, no. 04 (2008): 853–67. http://dx.doi.org/10.1142/s0219633608004167.

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The expressions for computing the spin density of spin-free valence bond wave functions are derived based on the bonded tableaux approach. The new expressions, although similar to the original forms given by Cooper and McWeeny in the 1960s, are simpler and thus easier for coding. The new formulation was implemented in VB2000, an ab initio valence bond program based on algebrant algorithm and group function theory. The spin density calculation for multi-group VB wave functions is also briefly discussed. As examples of applications, the spin densities of allyl radical and diazide anion [Formula:

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12

Li, Huihui, Bowen Dong, Qi Hu, et al. "A Voltage-Modulated Nanostrip Spin-Wave Filter and Spin Logic Device Thereof." Nanomaterials 12, no. 21 (2022): 3838. http://dx.doi.org/10.3390/nano12213838.

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A nanostrip magnonic-crystal waveguide with spatially periodic width modulation can serve as a gigahertz-range spin-wave filter. Compared with the regular constant-width nanostrip, the periodic width modulation creates forbidden bands (band gaps) at the Brillouin zone boundaries due to the spin-wave reflection by the periodic potential owing to the long-range dipolar interactions. Previous works have shown that there is a critical challenge in tuning the band structures of the magnonic-crystal waveguide once it is fabricated. In this work, using micromagnetic simulations, we show that voltage-

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13

Namiki, Wataru, Daiki Nishioka, Yuki Nomura, Kazuo Yamamoto, Kazuya Terabe, and Takashi Tsuchiya. "Iono-Magnonic Reservoir Computing Utilizing Interfered Spin Wave Manipulated By Ion-Gating." ECS Meeting Abstracts MA2024-02, no. 48 (2024): 3316. https://doi.org/10.1149/ma2024-02483316mtgabs.

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Physical reservoir computing is a promising candidate for implementing high-performance artificial intelligence devices, mimicking biological system by using nonbiological components. The reservoir computing network has fewer learning parameters than conventional deep learning, and the advantage leads to high-speed processing and low electric power consumption. Since the physical reservoir plays a vital role in mapping input information depending on past state nonlinearly into a high dimensional space, the physical device must possess nonlinearity, short-term memory, and high dimensionality. H

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14

Martyshkin A.A., Beginin E. N., and Sadovnikov A.V. "Frequency-selective propagation of spin waves in a three-dimensional magnon T-shaped splitter." Technical Physics 92, no. 13 (2022): 2114. http://dx.doi.org/10.21883/tp.2022.13.52231.134-21.

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Using numerical and experimental methods, the mechanism of control of the transmission of a spin-wave signal in a three-dimensional magnon splitter, formed by an orthogonal junction of magnetic strips of yttrium iron garnet, has been investigated. It is shown that by variation the size of the air gap between the spin-waveguide sections, it is possible to control the selection of the signal propagating in the output sections of the structure. From an applied point of view, the results obtained can be used to create an interconnection element in multilevel magnon information processing devices f

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15

Chen, Chao, Tao Lin, Jianteng Niu, et al. "Surface acoustic wave controlled skyrmion-based synapse devices." Nanotechnology 33, no. 11 (2021): 115205. http://dx.doi.org/10.1088/1361-6528/ac3f14.

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Abstract Magnetic skyrmions, which are particle-like spin structures, are promising information carriers for neuromorphic computing devices due to their topological stability and nanoscale size. In this work, we propose controlling magnetic skyrmions by electric-field-excited surface acoustic waves in neuromorphic computing device structures. Our micromagnetic simulations show that the number of created skyrmions, which emulates the synaptic weight parameter, increases monotonically with increases in the amplitude of the surface acoustic waves. Additionally, the efficiency of skyrmion creation

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16

Lake, S. R., B. Divinskiy, G. Schmidt, S. O. Demokritov, and V. E. Demidov. "Microscopic nonlinear magnonic phase shifters based on ultrathin films of a magnetic insulator." Applied Physics Letters 121, no. 5 (2022): 052403. http://dx.doi.org/10.1063/5.0100525.

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Since magnonics takes advantage of not only the amplitude of spin waves but also their phase, tunable phase shifters are key elements for the implementation of magnonic circuits. Therefore, one of the major challenges in nano-magnonics is to find a physical mechanism to manipulate the spin-wave phase practically in simple and miniature devices. In this work, we experimentally demonstrate that intrinsic magnetic nonlinearities allow the implementation of efficient microscopic tunable phase shifters, where the phase is controlled by wave intensity. In the proposed devices, we achieve the tunabil

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17

BUNEA, Alina-Cristina, Florin CIUBOTARU, and Fanfan MENG. "Measurement of Electromagnetic Feedthrough in Spin Wave Based Microwave Multiport Devices." Romanian Journal of Information Science and Technology 28, no. 2 (2025): 125–37. https://doi.org/10.59277/romjist.2025.2.01.

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Multiport radio-frequency (RF) input devices are designed to handle multiple signals simultaneously. These devices typically consist of multiple input ports that can receive different RF signals and combine them into a single output or distribute them to multiple outputs. For example, in wave computing, majority gates use an odd number of inputs and one output. This paper investigates the electromagnetic feedthrough of a 3-input/1-output majority gate layout based on spin waves (SWMGs) and U-shaped microwave spin-wave transducers. The paper addresses the challenges of electromagnetic feedthrou

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18

Nishimura, Maki, Wataru Namiki, Daiki Nishioka, Kazuya Terabe, and Takashi Tsuchiya. "Optimization of Reservoir Computing Utilizing Interfered Spin Waves." ECS Meeting Abstracts MA2024-02, no. 48 (2024): 3385. https://doi.org/10.1149/ma2024-02483385mtgabs.

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Reservoir computing is a learning model that enables low-cost and fast learning compared to conventional deep learning. It enables physical implementation by replacing the reservoir part with a physical device that possesses nonlinearity, short-term memory, and high dimensionality. In particular, it was theoretically predicted that spin wave interference can perform highly efficient reservoir computing in micromagnetic simulations,[1] and it was experimentally verified by the present authors.[2] Whereas the computational performance was suggested to vary significantly depending on the interval

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19

Papp, A., G. Csaba, and W. Porod. "Characterization of nonlinear spin-wave interference by reservoir-computing metrics." Applied Physics Letters 119, no. 11 (2021): 112403. http://dx.doi.org/10.1063/5.0048982.

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20

Мартышкин, А. А., Е. Н. Бегинин та А. В. Садовников. "Частотно-селективное распространение спиновых волн в трехмерном магнонном Т-образном сплиттере". Журнал технической физики 91, № 10 (2021): 1555. http://dx.doi.org/10.21883/jtf.2021.10.51370.134-21.

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Using numerical and experimental methods, the mechanism of control of the transmission of a spin-wave signal in a three-dimensional magnon splitter, formed by an orthogonal junction of magnetic strips of yttrium iron garnet, has been investigated. It is shown that by variation the size of the air gap between the spin-waveguide sections, it is possible to control the selection of the signal propagating in the output sections of the structure. From an applied point of view, the results obtained can be used to create an interconnection element in multilevel magnon information processing devices f

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21

Zhou, Kaiyuan, Lina Chen, Kequn Chi, et al. "Current-driven magnetization dynamics and its correlation with magnetization configurations in perpendicularly magnetized tunnel junctions." Journal of Applied Physics 132, no. 17 (2022): 173906. http://dx.doi.org/10.1063/5.0107569.

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We study spin-transfer-torque-driven magnetization dynamics of a perpendicular magnetic tunnel junction nanopillar. Through the combined investigations on spin-torque ferromagnetic resonance and microwave spectroscopy, it is found that the free layer (FL) and the weak pinned reference layer (RL) exhibit distinct dynamic behaviors. First, frequency vs field dispersion for the FL and RL shows an opposite trend as the field varies. Second, the FL can support a single spin-wave (SW) mode for both parallel and antiparallel configurations, while the RL exhibits spin-wave excitation only for the anti

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22

Lötstedt, Erik, Lidong Wang, Ryuhei Yoshida, Youyuan Zhang, and Kaoru Yamanouchi. "Error-mitigated quantum computing of Heisenberg spin chain dynamics." Physica Scripta 98, no. 3 (2023): 035111. http://dx.doi.org/10.1088/1402-4896/acbcac.

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Abstract We simulate the time-dependent dynamics of a three-site spin chain described by the Heisenberg XXX Hamiltonian. The quantum circuit representing the time-dependent wave function is constructed using the Suzuki-Trotter approximation, and is executed on the quantum computer ibm_kawasaki. At each time step, the density matrix of the three-qubit state is reconstructed by state tomography. By applying four different mitigation methods, Clifford data regression, Pauli twirling, density matrix purification, and density matrix orthogonalization, we demonstrate that accurate time-dependent pop

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23

Succar, Malek, and Mohammad Haidar. "Spin wave excitations in a nanowire spin Hall oscillator with perpendicular magnetic anisotropy." Journal of Applied Physics 133, no. 9 (2023): 093901. http://dx.doi.org/10.1063/5.0133176.

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Spin torque oscillators (STOs) are emerging microwave devices that can potentially be used in spin-logic devices and the next-generation high-speed computing architecture. Thanks to their non-linear nature, STOs are easily tunable by the magnetic field and the dc current. Spin Hall nano-oscillators are promising types of STOs and most of the current studies focus on localized modes that can be easily excited. Here, we study using micromagnetic simulations, the nature of the spin-torque-induced excitations in nanowire devices made of perpendicular magnetic anisotropy (PMA) materials. Our result

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24

Kurzyna, Stanisław, Bartosz Niewelt, Mateusz Mazelanik, Wojciech Wasilewski, and Michał Parniak. "Long-lived collective Rydberg excitations in atomic gas achieved via ac-Stark lattice modulation." Quantum 8 (August 2, 2024): 1431. http://dx.doi.org/10.22331/q-2024-08-02-1431.

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Collective Rydberg excitations provide promising applications ranging from quantum information processing, and quantum computing to ultra-sensitive electrometry. However, their short lifetime is an immense obstacle in real-life scenarios. The state-of-the-art methods of prolonging the lifetime were mainly implemented for ground-state quantum memories and would require a redesign to effectively work on different atomic transitions. We propose a protocol for extending the Rydberg excitation lifetime, which in principle can freeze the spin-wave and completely cancel the effects of thermal dephasi

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25

Namiki, Wataru, Daiki Nishioka, Takashi Tsuchiya, and Kazuya Terabe. "Fast physical reservoir computing, achieved with nonlinear interfered spin waves." Neuromorphic Computing and Engineering 4, no. 2 (2024): 024015. http://dx.doi.org/10.1088/2634-4386/ad561a.

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Abstract Reservoir computing is a promising approach to implementing high-performance artificial intelligence that can process input data at lower computational costs than conventional artificial neural networks. Although reservoir computing enables real-time processing of input time-series data on artificial intelligence mounted on terminal devices, few physical devices are capable of high-speed operation for real-time processing. In this study, we introduce spin wave interference with a stepped input method to reduce the operating time of the physical reservoir, and second-order nonlinear eq

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26

Namiki, Wataru, Yu Yamaguchi, Daiki Nishioka, Takashi Tsuchiya, and Kazuya Terabe. "Opto-magnonic reservoir computing coupling nonlinear interfered spin wave and visible light switching." Materials Today Physics 45 (June 2024): 101465. http://dx.doi.org/10.1016/j.mtphys.2024.101465.

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27

Ichimura, Takehiro, Ryosho Nakane, Gouhei Tanaka, and Akira Hirose. "A Numerical Exploration of Signal Detector Arrangement in a Spin-Wave Reservoir Computing Device." IEEE Access 9 (2021): 72637–46. http://dx.doi.org/10.1109/access.2021.3079583.

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28

Nikitin, Aleksei, Andrey Komlev, Andrey Nikitin, and Aleksej Ustinov. "Tunable spin-wave delay line based on ferrite and vanadium dioxide." Izvestiya VUZ. Applied Nonlinear Dynamics 30, no. 5 (2022): 605–16. http://dx.doi.org/10.18500/0869-6632-003006.

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One of the key elements for modern microwave circuits is a delay line, which is widely utilized for the signal generation as well as processing. Spin-wave delay lines based on ferrite films provide a high delay time and small dimensions. Typically, the performance characteristics of such lines are tuned by the variation of an externally applied magnetic field characterized by some drawbacks. The phenomenon of a metal–insulator transition (MIT) in the phase change materials permits to improve the performance characteristics of the spin-wave delay lines. In particular, this concept allows to red

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29

Salberger, Olof, and Vladimir Korepin. "Entangled spin chain." Reviews in Mathematical Physics 29, no. 10 (2017): 1750031. http://dx.doi.org/10.1142/s0129055x17500313.

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We introduce a new model of interacting spin 1/2. It describes interactions of three nearest neighbors. The Hamiltonian can be expressed in terms of Fredkin gates. The Fredkin gate (also known as the controlled swap gate) is a computational circuit suitable for reversible computing. Our construction generalizes the model presented by Peter Shor and Ramis Movassagh to half-integer spins. Our model can be solved by means of Catalan combinatorics in the form of random walks on the upper half plane of a square lattice (Dyck walks). Each Dyck path can be mapped on a wave function of spins. The grou

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30

Crippa, Luca, Francesco Tacchino, Mario Chizzini, et al. "Simulating Static and Dynamic Properties of Magnetic Molecules with Prototype Quantum Computers." Magnetochemistry 7, no. 8 (2021): 117. http://dx.doi.org/10.3390/magnetochemistry7080117.

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Magnetic molecules are prototypical systems to investigate peculiar quantum mechanical phenomena. As such, simulating their static and dynamical behavior is intrinsically difficult for a classical computer, due to the exponential increase of required resources with the system size. Quantum computers solve this issue by providing an inherently quantum platform, suited to describe these magnetic systems. Here, we show that both the ground state properties and the spin dynamics of magnetic molecules can be simulated on prototype quantum computers, based on superconducting qubits. In particular, w

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Crippa, Luca, Francesco Tacchino, Mario Chizzini, et al. "Simulating Static and Dynamic Properties of Magnetic Molecules with Prototype Quantum Computers." Magnetochemistry 7 (August 12, 2021): 117. https://doi.org/10.3390/ magnetochemistry7080117.

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Magnetic molecules are prototypical systems to investigate peculiar quantum mechanical phenomena. As such, simulating their static and dynamical behavior is intrinsically difficult for a classical computer, due to the exponential increase of required resources with the system size. Quantum computers solve this issue by providing an inherently quantum platform, suited to describe these magnetic systems. Here, we show that both the ground state properties and the spin dynamics of magnetic molecules can be simulated on prototype quantum computers, based on superconducting&nbsp

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32

Liu, Beijiang. "Partial wave analysis at BESIII." International Journal of Modern Physics: Conference Series 31 (January 2014): 1460306. http://dx.doi.org/10.1142/s2010194514603068.

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The BESIII experiment in Beijing takes data in τ-charm domain since 2009. For the moment the world largest samples of J/ψ, ψ(3686), ψ(3770) and ψ(4040) data have been collected. Hadron spectroscopy is a unique way to access QCD, which is one of the most important physics goals of BESIII. Experimental search of new forms of hadrons and subsequent investigation of their properties would provide validation of and valuable input to the quantitative understanding of QCD. The key to success lies in high levels of precision during the measurement and high statistics in the recorded data set complemen

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Ireland, Aurora, Stefano Profumo, and Jordan Scharnhorst. "Gravitational waves from primordial black hole evaporation with large extra dimensions." Journal of Cosmology and Astroparticle Physics 2024, no. 08 (2024): 033. http://dx.doi.org/10.1088/1475-7516/2024/08/033.

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Abstract The spectra of gravitational waves from black hole evaporation generically peak at frequencies of order the Hawking temperature, making this signal ultra-high frequency for primordial black holes evaporating in the early universe. This motivates us to consider small black holes in theories with large extra dimensions, for which the peak frequency can be lowered substantially, since the true bulk Planck scale M * can be much smaller than the effective M Pl. We study the emission of brane-localized gravitons during the Hawking evaporation of ultra-light primordial black holes in the con

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Mahmoud, Abdulqader Nael, Frederic Vanderveken, Florin Ciubotaru, Christoph Adelmann, Said Hamdioui, and Sorin Cotofana. "A Spin Wave-Based Approximate 4:2 Compressor: Seeking the most energy-efficient digital computing paradigm." IEEE Nanotechnology Magazine 16, no. 1 (2022): 47–56. http://dx.doi.org/10.1109/mnano.2021.3126095.

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Kohda, Makoto, Takeshi Seki, Yasushi Yuminaka, Tetsuya Uemura, Keito Kikuchi, and Gian Salis. "Perspective on spin-based wave-parallel computing." Applied Physics Letters 123, no. 19 (2023). http://dx.doi.org/10.1063/5.0168083.

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Waves exhibit unique characteristics, such as diffraction and interference, which distinguishes them from the particle nature of electrons currently used for binary and sequential data processing and storage. In the solid state, wave properties can be found in electron spin waves in semiconductors or magnons in magnetic materials. These are useful for communication, processing and storage, and allow multiplexing of the information. Given this perspective, after introducing the information theory of wave-parallel computing and arguing the fundamental properties necessary for implementation with

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Mahmoud, Abdulqader, Frederic Vanderveken, Florin Ciubotaru, Christoph Adelmann, Said Hamdioui, and Sorin Cotofana. "Spin Wave Based Approximate Computing." IEEE Transactions on Emerging Topics in Computing, 2021, 1. http://dx.doi.org/10.1109/tetc.2021.3136299.

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Chumak, A. V., P. Kabos, M. Wu, et al. "Roadmap on Spin-Wave Computing." IEEE Transactions on Magnetics, 2022, 1. http://dx.doi.org/10.1109/tmag.2022.3149664.

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Abdulqader, Mahmoud, Vanderveken Frederic, Adelmann Christoph, Ciubotaru Florin, Hamdioui Said, and Cotofana Sorin. "Fan-out enabled spin wave majority gate." March 16, 2020. https://doi.org/10.1063/1.5134690.

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Accepted Manuscript of AIP Advances <strong>10</strong>, 035119 (2020). This work has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 801055 ‘Spin Wave Computing for Ultimately-Scaled Hybrid Low-Power Electronics’ — ‘CHIRON’

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Ustinov, Alexey B., Roman V. Haponchyk, and Mikhail Kostylev. "A current-controlled magnonic reservoir for physical reservoir computing." Applied Physics Letters 124, no. 4 (2024). http://dx.doi.org/10.1063/5.0189542.

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Physical reservoir computers based on principles of magnonics promise energy efficient data processing and a reduction in the size and weight of the neuromorphic computing devices. The present work is a major step toward all-magnonic implementation of the recently proposed concept of a physical reservoir based on the spin wave active ring. The main component of the ring is a spin wave delay line employing a thin film of yttrium iron garnet (YIG) as the spin wave guiding medium. We propose controlling spin wave propagation in the YIG film electronically to enter input data into the reservoir. T

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Klíma, Jan, Ondřej Wojewoda, Václav Roučka, Tomáš Molnár, Jakub Holobrádek, and Michal Urbánek. "Zero-field spin wave turns." Applied Physics Letters 124, no. 11 (2024). http://dx.doi.org/10.1063/5.0189394.

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Spin-wave computing, a potential successor to CMOS-based technologies, relies on the efficient manipulation of spin waves for information processing. While basic logic devices such as magnon transistors, gates, and adders have been experimentally demonstrated, the challenge for complex magnonic circuits lies in steering spin waves through sharp turns. In this study, we demonstrate with micromagnetic simulations and Brillouin light scattering microscopy experiments, that dipolar spin waves can propagate through 90° turns without distortion. The key lies in carefully designed in-plane magnetizat

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Kostylev, Mikhail. "Bloembergen Problem based magnonic physical reservoir computing." Journal of Applied Physics 137, no. 21 (2025). https://doi.org/10.1063/5.0273688.

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In this work, we propose a concept of physical reservoir computing based on the three-wave decay of magnetostatic surface spin waves (MSSW) in a thin yttrium iron garnet film and numerically model the operation of a spin-wave active ring resonator (SWARR) under the influence of these three-wave processes as a physical reservoir. To ensure the reliability of our modeling results, we first confirm that, with some modifications, the mathematical model of the Bloembergen Problem for the nonlinear interaction of three waves is in good qualitative agreement with experimental data from the literature

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Qin, Huajun, Rasmus B. Holländer, Lukáš Flajšman, et al. "Nanoscale magnonic Fabry-Pérot resonator for low-loss spin-wave manipulation." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-22520-6.

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AbstractActive control of propagating spin waves on the nanoscale is essential for beyond-CMOS magnonic computing. Here, we experimentally demonstrate reconfigurable spin-wave transport in a hybrid YIG-based material structure that operates as a Fabry-Pérot nanoresonator. The magnonic resonator is formed by a local frequency downshift of the spin-wave dispersion relation in a continuous YIG film caused by dynamic dipolar coupling to a ferromagnetic metal nanostripe. Drastic downscaling of the spin-wave wavelength within the bilayer region enables programmable control of propagating spin waves

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Hu, Xiaoying. "Study of Spin-Wave Mode Coupling and Band Structure in Magnetostatic Crystal." Journal of Social Science and Cultural Development 1, no. 2 (2024). https://doi.org/10.70767/jsscd.v1i2.360.

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Magnetostatic crystals are magnetic materials with a periodic structure, and the coupling of their spin-wave modes and band structure has a significant impact on their dynamic behavior and applications. This paper investigates the spin-wave mode coupling mechanism, the evolution of the band structure, and the regulation methods within magnetostatic crystals. It explores their potential applications in fields such as spintronics and quantum computing. The study shows that the coupling of spin waves depends not only on exchange interactions but is also influenced by magnetic anisotropy, nonlinea

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Papp, Ádám, Wolfgang Porod, and Gyorgy Csaba. "Nanoscale neural network using non-linear spin-wave interference." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-26711-z.

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AbstractWe demonstrate the design of a neural network hardware, where all neuromorphic computing functions, including signal routing and nonlinear activation are performed by spin-wave propagation and interference. Weights and interconnections of the network are realized by a magnetic-field pattern that is applied on the spin-wave propagating substrate and scatters the spin waves. The interference of the scattered waves creates a mapping between the wave sources and detectors. Training the neural network is equivalent to finding the field pattern that realizes the desired input-output mapping.

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Wang, Qi, Roman Verba, Björn Heinz, et al. "Deeply nonlinear excitation of self-normalized short spin waves." Science Advances 9, no. 32 (2023). http://dx.doi.org/10.1126/sciadv.adg4609.

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Spin waves are ideal candidates for wave-based computing, but the construction of magnetic circuits is blocked by a lack of an efficient mechanism to excite long-running exchange spin waves with normalized amplitudes. Here, we solve the challenge by exploiting a deeply nonlinear phenomenon for forward volume spin waves in 200-nm-wide nanoscale waveguides and validate our concept using microfocused Brillouin light scattering spectroscopy. An unprecedented nonlinear frequency shift of more than 2 GHz is achieved, corresponding to a magnetization precession angle of 55° and enabling the excitatio

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Nikolaev, K. O., D. Raskhodchikov, J. Bensmann, et al. "A spin-wave frequency demultiplexer based on YIG nanowaveguides intersecting at a small angle." Applied Physics Letters 124, no. 21 (2024). http://dx.doi.org/10.1063/5.0203425.

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We experimentally demonstrate a simple design for a spin-wave frequency demultiplexer based on submicrometer-width yttrium iron garnet waveguides intersecting at an angle of 30°. We show that, depending on the frequency, spin waves excited in the input arm of the device are predominantly directed to one of the two output arms. This spin-wave routing is characterized by a large extinction ratio of about 10. The frequency response of the demultiplexer can be efficiently controlled by changing the static magnetic field and the geometry of the device. Due to the small intersection angle and symmet

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Nikolaev, K. O., S. R. Lake, G. Schmidt, S. O. Demokritov, and V. E. Demidov. "Resonant generation of propagating second-harmonic spin waves in nano-waveguides." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-46108-y.

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AbstractGeneration of second-harmonic waves is one of the universal nonlinear phenomena that have found numerous technical applications in many modern technologies, in particular, in photonics. This phenomenon also has great potential in the field of magnonics, which considers the use of spin waves in magnetic nanostructures to implement wave-based signal processing and computing. However, due to the strong frequency dependence of the phase velocity of spin waves, resonant phase-matched generation of second-harmonic spin waves has not yet been achieved in practice. Here, we show experimentally

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Iihama, Satoshi, Yuya Koike, Shigemi Mizukami, and Natsuhiko Yoshinaga. "Universal scaling between wave speed and size enables nanoscale high-performance reservoir computing based on propagating spin-waves." npj Spintronics 2, no. 1 (2024). http://dx.doi.org/10.1038/s44306-024-00008-5.

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AbstractPhysical implementation of neuromorphic computing using spintronics technology has attracted recent attention for the future energy-efficient AI at nanoscales. Reservoir computing (RC) is promising for realizing the neuromorphic computing device. By memorizing past input information and its nonlinear transformation, RC can handle sequential data and perform time-series forecasting and speech recognition. However, the current performance of spintronics RC is poor due to the lack of understanding of its mechanism. Here we demonstrate that nanoscale physical RC using propagating spin wave

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Waseem, Muhammad Hamza, and Alexy D. Karenowska. "String diagrams for wave-based computation." Applied Physics Letters 123, no. 24 (2023). http://dx.doi.org/10.1063/5.0183549.

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As fundamental scaling limits start to stifle the evolution of complementary metal–oxide–semiconductor transistor technology, interest in potential alternative computing platforms grows. One such alternative is wave-based computation. In this work, we propose a general string diagrammatic formalism for wave-based computation with phase encoding applicable to a wide range of emerging architectures and technologies, including quantum-dot cellular automata, single-electron circuits, spin torque majority gates, and DNA computing. We demonstrate its applicability for design, analysis, and simplific

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Namiki, Wataru, Daiki Nishioka, Yu Yamaguchi, Takashi Tsuchiya, Tohru Higuchi, and Kazuya Terabe. "Experimental Demonstration of High‐Performance Physical Reservoir Computing with Nonlinear Interfered Spin Wave Multidetection." Advanced Intelligent Systems, August 22, 2023. http://dx.doi.org/10.1002/aisy.202300228.

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Physical reservoir computing, which is a promising method for the implementation of highly efficient artificial intelligence devices, requires a physical system with nonlinearity, fading memory, and the ability to map in high dimensions. Although it is expected that spin wave interference can perform as highly efficient reservoir computing in some micromagnetic simulations, there has been no experimental verification to date. Herein, reservoir computing is demonstrated that utilizes multidetected nonlinear spin wave interference in an yttrium‐iron‐garnet single crystal. The subject computing s

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