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Probabilistic Ising machines (PIMs) provide a path to solving many computationally hard problems more efficiently than deterministic algorithms on von Neumann computers. Stochastic magnetic tunnel junctions (S-MTJs), which are engineered to…

Spin Hall oscillators (SHOs) based on bilayers of a ferromagnet (FM) and a non-magnetic heavy metal (HM) are electrically tunable nanoscale microwave signal generators. Achieving high output power in SHOs requires driving large-amplitude…

Mesoscale and Nanoscale Physics · Physics 2023-11-28 Eric Arturo Montoya , Amanatullah Khan , Christopher Safranski , Andrew Smith , Ilya N. Krivorotov

We show that Oscillator Ising Machines (OIMs) are prime candidates for use as neuromorphic machine learning processors with Equilibrium Propagation (EP) based on-chip learning. The inherent energy gradient descent dynamics of OIMs, combined…

Disordered Systems and Neural Networks · Physics 2025-08-19 Alex Gower

We report a higher-order neuromorphic Ising machine that exhibits superior scalability compared to architectures based on quadratization, while also achieving state-of-the-art quality and reliability in solutions with competitive…

Most oscillating reactions (ORs) happen in solutions. Few existing solid-based ORs either happen on solid/gas (e.g., oxidation or corrosion) or solid/liquid interfaces, or at the all-solid interfaces neighboring to metals or ionic…

In this letter, secure beamforming in a multiple intelligent reflecting surfaces (IRSs)-aided millimeter-wave (mmWave) system is investigated. In this system, the secrecy rate is maximized by controlling the on-off status of each IRS as…

Signal Processing · Electrical Eng. & Systems 2020-12-29 Yue Xiu , Jun Zhao , Chau Yuen , Zhongpei Zhang , Guan Gui

Optical parametric oscillators (OPOs) have been studied as basic components for optical computing with phase encoding and Ising machines. Integrated photonics offers a scalable solution to incorporate a progressively larger number of…

Optics · Physics 2025-05-16 Jost Kellner , Alessandra Sabatti , Andreas Meader , Rachel Grange

Memory security and reliability are two of the major design concerns in cloud computing systems. State-of-the-art memory security-reliability co-designs (e.g. Synergy) have achieved a good balance on performance, confidentiality, integrity,…

Cryptography and Security · Computer Science 2021-01-20 Wenpeng He , Dan Feng , Fang Wang , Yue Li , Mengting Lu

With the rapid development of high-speed railway systems and railway wireless communication, the application of ultra-wideband millimeter wave band is an inevitable trend. However, the millimeter wave channel has large propagation loss and…

Information Theory · Computer Science 2022-11-29 Panpan Li , Yong Niu , Hao Wu , Zhu Han , Bo Ai , Ning Wang , Zhangdui Zhong

Nonmagnetic topological insulators (TIs) are known for their robust metallic surface/edge states that are protected by time-reversal symmetry, making them promising candidates for next-generation spintronic and nanoelectronic devices.…

Mesoscale and Nanoscale Physics · Physics 2025-11-14 Arjyama Bordoloi , Daniel Kaplan , Sobhit Singh

Logic Obfuscation is a well renowned design-for-trust solution to protect an Integrated Circuit (IC) from unauthorized use and illegal overproduction by including key-gates to lock the design. This is particularly necessary for ICs…

Cryptography and Security · Computer Science 2024-04-12 Haimanti Chakraborty , Ranga Vemuri

Reconfigurable intelligent surface (RIS)-assisted transmission and space shift keying (SSK) appear as promising candidates for future energy-efficient wireless systems. In this paper, two RIS-based SSK schemes are proposed to efficiently…

Information Theory · Computer Science 2021-02-04 Qiang Li , Miaowen Wen , Shuai Wang , George C. Alexandropoulos , Yik-Chung Wu

The effect on the resistive switching (RS) mechanism in organic semiconductor (OSC), Poly(3-hexylthiophene-2,5-diyl) (P3HT), due to the presence of the perforated bottom electrode (PBE) is investigated. The simulation shows a high local…

Materials Science · Physics 2026-01-27 Sirsendu Ghosh , Pramod Kumar

In this paper, we propose a Slotted ALOHA (SA)-inspired solution for an indoor optical wireless communication (OWC)-based Internet of Things (IoT) system. Assuming that the OWC receiver exploits the capture effect, we are interested in the…

Networking and Internet Architecture · Computer Science 2022-11-17 Tijana Devaja , Milica Petkovic , Francisco J. Escribano , Cedomir Stefanovic , Dejan Vukobratovic

Spin transfer torque nano-oscillators are potential candidates for replacing the traditional inductor based voltage controlled oscillators in modern communication devices. Typical oscillator designs are based on trilayer magnetic tunnel…

Mesoscale and Nanoscale Physics · Physics 2017-12-20 Abhishek Sharma , Ashwin A Tulapurkar , Bhaskaran Muralidharan

By activating blocked users and altering successive interference cancellation (SIC) sequences, reconfigurable intelligent surfaces (RISs) become promising for enhancing non-orthogonal multiple access (NOMA) systems. The downlink RIS-aided…

Information Theory · Computer Science 2020-08-20 Chao Zhang , Wenqiang Yi , Yuanwei Liu

Intelligent reflecting surfaces (IRSs) have attracted considerable attention because of their ability to dynamically control electromagnetic wave propagation. While most existing IRSs have been developed for low-power communication and…

In this paper, a 3-terminal spin-transfer torque nano-oscillator (STNO) is studied using the concurrent spin injection of a spin-polarized tunneling current and a spin Hall current exciting the free layer into dynamic regimes beyond what is…

We consider a massive Internet of Things (IoT) scenario where indoor IoT devices access the network via optical wireless communication (OWC) IoT systems that relay data via a backhaul radio frequency (RF) low-power wide-area network (LP…

Networking and Internet Architecture · Computer Science 2023-02-21 Milica Petkovic , Dejan Vukobratovic , Andrea Munari , Federico Clazzer

Reconfigurable intelligent surface (RIS) has been regarded as a promising technology since it has ability to create the favorable channel conditions. This paper investigates the secure communications of RIS assisted non-orthogonal multiple…

Information Theory · Computer Science 2024-03-19 Yingjie Pei , Xinwei Yue , Wenqiang Yi , Yuanwei Liu , Xuehua Li , Zhiguo Ding