Results 11 to 20 of about 124,083 (285)

Multi-scale homogenization with bounded ratios and Anomalous Slow Diffusion [PDF]

open access: yes, 2002
We show that the effective diffusivity matrix $D(V^n)$ for the heat operator $\partial_t-(\Delta/2-\nabla V^n \nabla)$ in a periodic potential $V^n=\sum_{k=0}^n U_k(x/R_k)$ obtained as a superposition of Holder-continuous periodic potentials $U_k$ (of ...
Ben-Arous, Gérard, Owhadi, Houman
core   +3 more sources

Quantum state engineering by a coherent superposition of photon subtraction and addition [PDF]

open access: yes, 2010
We study a coherent superposition of field annihilation and creation operator acting on continuous variable systems and propose its application for quantum state engineering.
Lee, Su-Yong, Nha, Hyunchul
core   +3 more sources

Does gravity induce wavefunction collapse? An examination of Penrose's conjecture [PDF]

open access: yes, 2013
According to Penrose, the fundamental conflict between the superposition principle of quantum mechanics and the principle of general covariance of general relativity entails the existence of wavefunction collapse, e.g.
Gao, Shan
core   +3 more sources

Some inequalities and superposition operator in the space of regulated functions

open access: yesAdvances in Nonlinear Analysis, 2019
Some inequalities connected to measures of noncompactness in the space of regulated function R(J, E) were proved in the paper. The inequalities are analogous of well known estimations for Hausdorff measure and the space of continuous functions.
Olszowy Leszek, Zając Tomasz
doaj   +1 more source

Coulomb solutions from improper pseudo-unitary free gauge field operator translations [PDF]

open access: yes, 2014
Fundamental problems of quantum field theory related to the representation problem of canonical commutation relations are discussed within a gauge field version of a van Hove-type model.
Aste, Andreas
core   +4 more sources

On Generalized Step-Functions and Superposition Operators [PDF]

open access: yesgmj, 2004
Abstract For a given σ-ideal of sets, the notion of a generalized stepfunction is introduced and investigated in connection with the problem of sup-measurability of certain functions of two variables, regarded as superposition operators.
openaire   +3 more sources

Uniformly Continuous Superposition Operators In The Space Of Functions Of Bounded n-Dimensional Φ-Variation

open access: yesDemonstratio Mathematica, 2014
We prove that if a superposition operator maps a subset of the space of all metric-vector-space-valued-functions of bounded n-dimensional Φ-variation into another such space, and is uniformly continuous, then the generating function of the operator is an
Bracamonte Mireya   +3 more
doaj   +1 more source

Construction and applications of the Dirichlet-to-Neumann operator in transmission line modeling [PDF]

open access: yes, 2009
The Dirichlet-to-Neumann (DIN) operator is a useful tool in the characterization of interconnect structures. in. combination with the Method of Moments; it con.
De Zutter, Daniël, Demeester, Thomas
core   +1 more source

Space of State Vectors in PT Symmetrical Quantum Mechanics [PDF]

open access: yes, 2001
Space of states of PT symmetrical quantum mechanics is examined. Requirement that eigenstates with different eigenvalues must be orthogonal leads to the conclusion that eigenfunctions belong to the space with an indefinite metric.
Azizov T Ya   +13 more
core   +2 more sources

On Nonlinear Vekua Type Equations

open access: yesNonlinear Analysis, 2006
Nonlinear Vekua-Bers type differential equations are studied on the base of certain methods of nonlinear analysis. A survey of recent results in the area is presented.
S. V. Rogosin
doaj   +1 more source

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