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Fast magnetic fluctuations due to thermal torques have useful technological functionality ranging from cryptography to probabilistic computing. The characteristic time of fluctuations in typical uniaxial anisotropy magnets studied so far is…

介观与纳米尺度物理 · 物理学 2019-12-04 Jan Kaiser , Avinash Rustagi , Kerem Y. Camsari , Jonathan Z. Sun , Supriyo Datta , Pramey Upadhyaya

We analyze the dynamics of N interacting spins (quantum register) collectively coupled to a thermal environment. Each spin experiences the same environment interaction, consisting of an energy conserving and an energy exchange part. We find…

数学物理 · 物理学 2009-11-13 M. Merkli , G. P. Berman , I. M. Sigal

In magnetic memory and logic devices, a magnet's magnetization is usually flipped with a spin polarized current delivering a spin transfer torque (STT). This mode of switching consumes too much energy and considerable energy saving can…

介观与纳米尺度物理 · 物理学 2015-03-17 Kuntal Roy , Supriyo Bandyopadhyay , Jayasimha Atulasimha

Heat spontaneously flows from hot to cold in standard thermodynamics. However, the latter theory presupposes the absence of initial correlations between interacting systems. We here experimentally demonstrate the reversal of heat flow for…

In this paper, we propose Energy-efficient Adaptive Scheme for Transmission (EAST) in WSNs. EAST is IEEE 802.15.4 standard compliant. In this approach, open-loop is used for temperature-aware link quality estimation and compensation.…

网络与互联网体系结构 · 计算机科学 2016-11-17 M. Tahir , N. Javaid , Z. A. Khan , U. Qasim , M. Ishfaq

In this paper, we design, analyze, and numerically validate positive and energy-dissipating schemes for solving the time-dependent multi-dimensional system of Poisson-Nernst-Planck (PNP) equations, which has found much use in the modeling…

数值分析 · 数学 2020-02-24 Hailiang Liu , Wumaier Maimaitiyiming

Adaptive physical and biological systems continually process fluctuating information from their environments. When the environment is nonstationary, inference itself becomes a nonequilibrium process with thermodynamic cost. We analyse a…

统计力学 · 物理学 2026-03-23 Aditya Gupta

Increasing research efforts have been made to improve the energy efficiency of variable impedance actuators (VIAs) through reduction of energy consumption. However, the harvesting of dissipated energy in such systems remains underexplored.…

系统与控制 · 计算机科学 2018-10-29 Fan Wu , Matthew Howard

We proposed a new mechanism of LENR: cooperative processes in whole system -- nuclei+atoms+condensed matter can occur at smaller threshold energies then corresponding ones on free constituents. The cooperative processes can be induced and…

综合物理 · 物理学 2025-02-08 F. A. Gareev , I. E. Zhidkova

Applications of magnetic memory devices greatly benefit from ultra-fast, low-power switching. Here we propose how this can be achieved efficiently in a nano-sized synthetic antiferromagnet by using perpendicular-to-the-plane…

介观与纳米尺度物理 · 物理学 2016-04-06 B. C. Koop , T. Descamps , V. Korenivski

Single-electron pumps based on tunable-barrier quantum dots are the most promising candidates for a direct realization of the unit ampere in the recently revised SI: they are simple to operate and show high precision at high operation…

介观与纳米尺度物理 · 物理学 2022-05-24 Frank Hohls , Vyacheslavs Kashcheyevs , Friederike Stein , Tobias Wenz , Bernd Kaestner , Hans W. Schumacher

The negative differential thermal conductance (NDTC) provides the key mechanism for realizing thermal transistors. This exotic effect has been the object of an extensive theoretical investigation, but the implementation is still limited to…

介观与纳米尺度物理 · 物理学 2023-04-17 Shobhit Saheb Dey , Giuliano Timossi , Luigi Amico , Giampiero Marchegiani

Phase change memory (PCM) is one of the leading candidates for neuromorphic hardware and has recently matured as a storage class memory. Yet, energy and power consumption remain key challenges for this technology because part of the PCM…

介观与纳米尺度物理 · 物理学 2021-09-20 Keren Stern , Nicolás Wainstein , Yair Keller , Christopher M. Neumann , Eric Pop , Shahar Kvatinsky , Eilam Yalon

Recently, thermal switching has been extensively studied because it is a key component for thermal management in electronic devices. Here, we show a huge magneto-thermal-switching ratio (MTSR) in pure Nb at temperatures lower than its…

材料科学 · 物理学 2023-03-15 Miku Yoshida , Md. Riad Kasem , Aichi Yamashita , Ken-ichi Uchida , Yoshikazu Mizuguchi

The increasing integration of power electronic devices is driving the development of more advanced tools and methods for the modeling, analysis, and control of modern power systems to cope with the different time-scale oscillations. In this…

系统与控制 · 电气工程与系统科学 2019-10-22 Umberto Biccari , Noboru Sakamoto , Eneko Unamuno , Danel Madariaga , Enrique Zuazua , Jon Andoni Barrena

Desirably, the world relies on the devices being compact, as they could drive to the increased functionality of integrated circuits at the provided footstep, that is becoming more reliable. To reduce the scalability over the devices,…

材料科学 · 物理学 2024-01-30 Lephe S , Gifrin Fredik Raj S , Abijesh Euphrine A , Janaki S , Jamina C , Arun Jose L

An increasing penetration of renewable generation has led to reduced levels of rotational inertia and damping in the system. The consequences are higher vulnerability to disturbances and deterioration of the dynamic response of the system.…

We investigate the stochastic dynamics of nanoscale perpendicular magnetic tunnel junctions (pMTJs) and the correlations that arise when they are electrically coupled. Individual junctions exhibit thermally activated spin-transfer torque…

介观与纳米尺度物理 · 物理学 2026-02-04 Dairong Chen , Ahmed Sidi El Valli , Jonathan Z. Sun , Flaviano Morone , Dries Sels , Andrew D. Kent

We consider a system of two linear and linearly coupled oscillators with ideal impact constraints. Primary resonant energy exchange is investigated by analysis of the slow-flow using the action-angle (AA) formalism. Exact inversion of the…

混沌动力学 · 物理学 2018-08-15 Nathan Perchikov , O. V. Gendelman

We apply the thermal (imaginary time) perturbative expansion to the relevant effective field theory to compute characteristics of the phase transition to the ordered state which can occur at low temperatures in the gas of (nonrelativistic)…

量子气体 · 物理学 2023-09-27 Oskar Grocholski , Piotr H. Chankowski