Results 91 to 100 of about 306,107 (293)

The Balian--Low theorem for the symplectic form on ${\mathbb R}^{2d}$

, 2002
In this paper we extend the Balian--Low theorem, which is a version of the uncertainty principle for Gabor (Weyl--Heisenberg) systems, to functions of several variables. In particular, we first prove the Balian--Low theorem for arbitrary quadratic forms.
Benedetto, John J., Czaja, Wojciech, Maltsev, Andrei Ya.   +2 more
core   +1 more source

2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics

Advanced Functional Materials, EarlyView.
2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit, Yifei Yang, Shawn Li, Yu‐Chia Chen, Qi Jia, Jian‐Ping Wang   +5 more
wiley   +1 more source

Tensor Formulation of Kalman Filter and Linear Quadratic Gaussian Controller for Applications on Multilinear Dynamical Systems

IET Radar, Sonar & Navigation
In this work, we generalise the popular Kalman filter and Linear Quadratic Gaussian controller for use on multi‐sensor and multi‐agent/‐target radar systems.
Alfonso Farina, Stefano Carletta, Giovanni Battista Palmerini, Francesco DeAngelis   +3 more
doaj   +1 more source

Path integrals and wavepacket evolution for damped mechanical systems

, 2006
Damped mechanical systems with various forms of damping are quantized using the path integral formalism. In particular, we obtain the path integral kernel for the linearly damped harmonic oscillator and a particle in a uniform gravitational field with ...
A. Das, Dharmesh Jain, Feynman R. P., Resnick R., Sakurai J. J., Sayan Kar, Weinberg S.   +6 more
core   +1 more source

Hasse's principle for systems of ternary quadratic forms and for one biquadratic form [PDF]

Studia Mathematica, 1983
Let \(f_1,\ldots,f_k\in K[x_1,\ldots,x_n]\) be a system of \(k\) quadratic forms in \(n\) variables over an algebraic number field \(K\). The Hasse principle asserts that if \(f_1,\ldots,f_k\) have a common non-trivial zero in every completion of \(K\) then they have a common non-trivial zero in \(K\).
openaire   +2 more sources

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

Advanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

Estimates of Reachable Sets for Systems with Impulsive Control, Uncertainty and Nonlinearity

Известия Иркутского государственного университета: Серия "Математика", 2017
The problem of estimating trajectory tubes for nonlinear controlled dynamical systems with uncertainty in the initial data is studied. It is assumed that the dynamic system has a special structure in which the nonlinear terms are defined by quadratic ...
T. F. Filippova
doaj   +1 more source

MagPiezo: A Magnetogenetic Platform for Remote Activation of Endogenous Piezo1 Channels in Endothelial Cells

Advanced Functional Materials, EarlyView.
MagPiezo enables wireless activation of endogenous Piezo1 channels without genetic modification using 19 nm magnetic nanoparticles and low‐intensity magnetic fields. It generates torque forces at the piconewton scale to trigger mechanotransduction in endothelial cells, standing as a novel platform to interrogate and manipulate Piezo1 activity in vitro.
Susel Del Sol‐Fernández, Mariarosaria De Simone, Yilian Fernández‐Afonso, Daniel Garcia‐Gonzalez, Pablo Martínez‐Vicente, Thomas van Zanten, Raluca M. Fratila, Maria Moros   +7 more
wiley   +1 more source

Breathable Graphene Oxide‐Polymer Composite Membranes With Two‐Step Barrier Mechanism Against Nerve Agents

Advanced Functional Materials, EarlyView.
ABSTRACT Breathable membranes that reject chemical warfare agents (CWAs) are required for next‐generation protective apparel. A dual‐function graphene oxide (GO)‐polyamine architecture is introduced that addresses the long‐standing tradeoff between vapor transmission and CWA selectivity.
Hyungjun Kim, Chanui Lee, Keunhong Jeong, Seonggi Kim, Hyunju Shin, Sunghan Kim, Youngho Jin   +6 more
wiley   +1 more source

Exact Solutions to a Model for Micropolar Fluid Flows with Rayleigh Energy Dissipation

Physics
Polynomial exact solutions of the Navier–Stokes equations for describing micropolar incompressible fluid flows with energy dissipation are reported. The transformation of mechanical energy into thermal energy is taken into account.
Evgenii Yu. Prosviryakov, Evgenii S. Baranovskii, Sergey V. Ershkov, Alexander V. Yudin   +3 more
doaj   +1 more source