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High-gain optical parametric amplification is an important nonlinear process used both as a source of coherent infrared light and as a source of nonclassical light. In this work, we experimentally demonstrate an approach to optical…

For passive, lossless impenetrable metasurfaces, a design technique for arbitrary beam control of receiving, guiding, and launching is presented. Arbitrary control is enabled by a custom surface wave in an orthogonal polarization such that…

光学 · 物理学 2018-02-01 Do-Hoon Kwon , Sergei A. Tretyakov

The direct random-phase approximation (dRPA) is used to calculate and compare atomization energies for the HEAT set and 10 selected molecules of the G2-1 set using both plane waves and Gaussian-type orbitals. We describe detailed procedures…

The GW method is a many-body electronic structure technique capable of generating accurate quasiparticle properties for realistic systems spanning physics, chemistry, and materials science. Despite its power, GW is not routinely applied to…

计算物理 · 物理学 2020-02-19 Minjung Kim , Glenn J. Martyna , Sohrab Ismail-Beigi

Recently an optical amplification process called the plasmon injection scheme was introduced as an effective solution to overcoming losses in metamaterials. Implementations with near-field imaging applications have indicated substantial…

光学 · 物理学 2020-08-26 Anindya Ghoshroy , Wyatt Adams , Durdu O. Guney

The projection predictive variable selection is a decision-theoretically justified Bayesian variable selection approach achieving an outstanding trade-off between predictive performance and sparsity. Its projection problem is not easy to…

统计方法学 · 统计学 2024-06-11 Frank Weber , Änne Glass , Aki Vehtari

Surface acoustic wave (SAW) devices form an important class of acoustofluidic devices, in which the acoustic waves are generated and propagate along the surface of a piezoelectric substrate. Despite their wide-spread use, only a few fully…

应用物理 · 物理学 2020-01-28 Nils R. Skov , Prateek Sehgal , Brian J. Kirby , Henrik Bruus

This letter aims to maximize the average throughput via the joint design of the transmit power and trajectory for unmanned aerial vehicle (UAV)-enabled network. The conventional way to tackle this problem is based on the alternating…

信号处理 · 电气工程与系统科学 2020-03-11 Hongying Tang , Qingqing Wu , Jing Xu , Wen Chen , Baoqing~Li

Underwater visuals undergo various complex degradations, inevitably influencing the efficiency of underwater vision tasks. Recently, diffusion models were employed to underwater image enhancement (UIE) tasks, and gained SOTA performance.…

计算机视觉与模式识别 · 计算机科学 2026-02-13 Chen Zhao , Chenyu Dong , Weiling Cai , Yueyue Wang

It is shown that a sub-luminal electromagnetic plasma wave, propagating in phase with a background sub-luminal gravitational wave in a dispersive medium, can undergo parametric amplification. For this phenomena to occur, the dispersive…

等离子体物理 · 物理学 2023-04-05 Swadesh M. Mahajan , Felipe A. Asenjo

In this work we review the most common methods for absorbing waves in Reynolds-Averaged Navier-Stokes (RANS) models. The limitations of active wave absorption, originating from its initial assumption of linear wave theory in shallow waters…

流体动力学 · 物理学 2021-05-18 Pablo Higuera

We numerically study the acoustic parametric amplification of spin waves using surface acoustic waves (SAW) in a magnetic thin film. First, we illustrate how the process of parametric spin-wave generation using short-waved SAWs with a fixed…

应用物理 · 物理学 2023-02-22 M. Mohseni , A. Hamadeh , M. Geilen , P. Pirro

This paper describes a method to do ab initio molecular dynamics in electronically excited systems within the random phase approximation (RPA). Using a dynamical variational treatment of the RPA frequency, which corresponds to the…

凝聚态物理 · 物理学 2009-10-31 Eric R. Bittner , D. S. Kosov

Achieving the very special condition of perfect absorption (PA) in a complex scattering enclosure promises to enable a wealth of applications in secure communication, precision sensing, wireless power transfer, analog signal processing and…

经典物理 · 物理学 2021-02-09 Mohammadreza F. Imani , David R. Smith , Philipp del Hougne

Owing to the computational complexity of electronic structure algorithms running on classical digital computers, the range of molecular systems amenable to simulation remains tightly circumscribed even after many decades of work. Quantum…

量子物理 · 物理学 2022-05-18 Alexis Ralli , Michael I. Williams , Peter V. Coveney

We investigate different mechanical effects which accompany the nerve pulse propagation by using mathematical modeling. The propagation process is composed by three connected phenomena: (i) the action potential (electrical signal) which is…

生物物理 · 物理学 2019-06-05 Kert Tamm , Tanel Peets , Jüri Engelbrecht

Atomic probe tomography (APT), based on the work of Erwin Mueller, is able to generate three-dimensional chemical maps in atomic resolution. The required instruments for APT have evolved over the last 20 years from an experimental to an…

Semi-analytical methods, such as rigorous coupled wave analysis, have been pivotal for numerical analysis of photonic structures. In comparison to other methods, they offer much faster computation, especially for structures with constant…

数值分析 · 数学 2022-10-03 Ziwei Zhu , Changxi Zheng

A two-dimensional generalized hydrodynamics (GH) model is developed to study the full spectrum of both longitudinal and transverse dust acoustic waves (DAW) in strongly coupled complex (dusty) plasmas, with memory-function-formalism being…

等离子体物理 · 物理学 2015-05-19 Nitin Upadhyaya , Z. L. Miskovic , L. -J. Hou

All-atom molecular dynamics has been recently proven a useful tool for the study of supramolecular polymers. While the high resolution offered by the atomistic models may allow for deep comprehension of the assembled structure, obtaining a…

软凝聚态物质 · 物理学 2018-04-20 Davide Bochicchio , Giovanni M. Pavan