Results 41 to 50 of about 183,857 (232)

Spreading Speed in A Nonmonotone Equation with Dispersal and Delay

Mathematics, 2019
This paper is concerned with the estimation of spreading speed of a nonmonotone equation, which involves time delay and nonlocal dispersal. Due to the time delay, this equation does not generate monotone semiflows when the positive initial value is given.
Xi-Lan Liu, Shuxia Pan
doaj   +1 more source

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Coherent Structures in Nonlocal Dispersive Active-Dissipative Systems [PDF]

SIAM Journal on Applied Mathematics, 2015
The authors study coherent structures in nonlocal dispersive equations with instabilities (energy production) or stabilities (energy dissipation). They consider the Kuramoto--Sivashinsky equation with additional nonlocal term and analyze the efffect of nonlocal terms on coherent structures. As the Shilnikov-type approach is not applicable, they develop
Te-Sheng Lin, Marc Pradas, Serafim Kalliadasis, Demetrios T. Papageorgiou, Dmitri Tseluiko   +4 more
openaire   +5 more sources

Experiments on Nonlocal Fluid‐Flow Metamaterials

Advanced Science, EarlyView.
A nonlocal fluid‐flow metamaterial composed of standard microfluidic tubes and connectors is designed. Hence, the current of the system at one position depends on the gradient of fluid flow at many other positions, leading to unusual alternating backward and forward laminar flows of water.
Ke Wang, Yi Chen, Martin Wegener
wiley   +1 more source

Chiral‐Nematic Lattice Instability in Charge Density Wave of 1T‐TiSe2

Advanced Science, EarlyView.
The charge density wave of 1T‐TiSe2 appears chiral to surface probes yet loses all symmetry in spectroscopic measurements. This study reveals how cooperative condensation of multiple phonon modes stabilizes a chiral monoclinic ground state, while a shallow nematic energy landscape allows the lattice to break the remaining symmetry at negligible cost ...
Abdurrafi Ahsan Alghifari, Euihwan Do, Jae Whan Park, Han Woong Yeom   +3 more
wiley   +1 more source

Pulsating fronts for nonlocal dispersion and KPP nonlinearity

Annales de l'Institut Henri Poincaré C, Analyse non linéaire, 2013
In this paper we are interested in propagation phenomena for nonlocal reaction–diffusion equations of the type: \frac{\partial u}{\partial t} = J\ast u−u + f(x,u)\:t \in \mathbb{R},\:x \in \mathbb{R}^{N}, where J is
Coville, Jérôme, Davila, Juan, Martinez, Salome   +2 more
openaire   +10 more sources

Metasurface‐Based Multidimensional Light‐Field Manipulation: From Technologies to Applications

Advanced Science, EarlyView.
Multidimensional metasurfaces enable versatile manipulation of multiple optical degrees of freedom, including phase, amplitude, polarization, wavelength, and orbital angular momentum. This review summarizes their fundamental mechanisms, emerging strategies for multidimensional light‐field control, and key applications in optical computing, imaging ...
Heliang Yin, Shuo Sun, Jiahao Zhang, Jianuo Hu, Yubin Qiao, Liang Chen, Jin Li   +6 more
wiley   +1 more source

Perspective: Quantum Computing on Magnetic Racetrack

Advanced Electronic Materials, EarlyView.
Magnetic domain walls emerge as mobile qubits on quantum racetracks, where chirality encodes quantum information and current‐driven motion enables flying‐qubit functionality. This Perspective outlines the physical principles, gate mechanisms, material requirements, and experimental roadmap for realizing scalable quantum computing with magnetic textures,
Ji Zou, Jelena Klinovaja, Daniel Loss
wiley   +1 more source

Exponential Stability of Traveling Waves with Application to Structured Population Dynamics

Mathematics
We investigate the dynamical stability of traveling-wave solutions in a scalar, age-structured model that incorporates nonlocal dispersal. By combining a comparison argument with a weighted-energy framework tailored to the convolution-type operator, we ...
Muhammad Irfan Ullah, Qura Tul Ain
doaj   +1 more source

Nonclassical nature of dispersion cancellation and nonlocal interferometry [PDF]

Physical Review A, 2009
10 pages, 8 figures; minor revisions, to appear in Phys.
openaire   +2 more sources