Results 31 to 40 of about 175,173 (185)

Boundary conditions and renormalized stress-energy tensor on a Poincar\'e patch of $\textrm{AdS}_2$ [PDF]

open access: yes, 2019
Quantum field theory on anti-de Sitter spacetime requires the introduction of boundary conditions at its conformal boundary, due essentially to the absence of global hyperbolicity.
Barroso, Vitor S.   +2 more
core   +2 more sources

Boundary effects to the entanglement entropy and two-site entanglement of the spin-1 valence-bond solid

open access: yes, 2007
We investigate the von Neumann entropy of a block of subsystem for the valence-bond solid (VBS) state with general open boundary conditions. We show that the effect of the boundary on the von Neumann entropy decays exponentially fast in the distance ...
Christopher Hadley   +6 more
core   +1 more source

Pointwise observation of the state given by parabolic system with boundary condition involving multiple time delays

open access: yesArchives of Control Sciences, 2016
Various optimization problems for linear parabolic systems with multiple constant time delays are considered. In this paper, we consider an optimal distributed control problem for a linear parabolic system in which multiple constant time delays appear in
Kowalewski Adam
doaj   +1 more source

S-shaped connected component of positive solutions for second-order discrete Neumann boundary value problems

open access: yesOpen Mathematics, 2020
By using the bifurcation method, we study the existence of an S-shaped connected component in the set of positive solutions for discrete second-order Neumann boundary value problem.
Miao Liangying, Liu Jing, He Zhiqian
doaj   +1 more source

Localized low-frequency Neumann modes in 2d-systems with rough boundaries

open access: yes, 2004
We compute the relative localization volumes of the vibrational eigenmodes in two-dimensional systems with a regular body but irregular boundaries under Dirichlet and under Neumann boundary conditions.
Born M.   +5 more
core   +2 more sources

Spectrum of the Laplacian in narrow tubular neighbourhoods of hypersurfaces with combined Dirichlet and Neumann boundary conditions [PDF]

open access: yes, 2013
We consider the Laplacian in a domain squeezed between two parallel hypersurfaces in Euclidean spaces of any dimension, subject to Dirichlet boundary conditions on one of the hypersurfaces and Neumann boundary conditions on the other.
Krejcirik, David
core   +2 more sources

Nonlinear Klein-Gordon-Maxwell systems with Neumann boundary conditions on a Riemannian manifold with boundary

open access: yes, 2014
Let (M,g) be a smooth compact, n dimensional Riemannian manifold, n=3,4 with smooth n-1 dimensional boundary. We search the positive solutions of the singularly perturbed Klein Gordon Maxwell Proca system with homogeneous Neumann boundary conditions or ...
A. Azzollini   +16 more
core   +1 more source

Homogenization of elliptic systems with Neumann boundary conditions [PDF]

open access: yesJournal of the American Mathematical Society, 2013
39 ...
Kenig, Carlos E.   +2 more
openaire   +3 more sources

Digital Simulation of Diffusion Limited Chronoamperometry at Disk Electrodes without Neumann Boundary Conditions on the axis or at the insulating plane

open access: yesInternational Journal of Electrochemical Science, 2008
It is proposed that in the digital simulation of a disk (or band) electrode flush with an insulating plane, the customary Neumann boundary conditions can be dispensed with on the axis and at the insulating plane, and diffusion can be applied in the ...
D. Britz
doaj   +1 more source

Dirichlet to Neumann operator for abelian Yang-Mills gauge fields

open access: yes, 2017
We consider the Dirichlet to Neumann operator for abelian Yang- Mills boundary conditions. We treat the case for space-time manifolds with general smooth boundary components.
Diaz-Marin, Homero G.
core   +1 more source

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