Results 31 to 40 of about 6,846,631 (327)

Dynamics of Symmetry Breaking and Tachyonic Preheating [PDF]

open access: yes, 2000
We reconsider the old problem of the dynamics of spontaneous symmetry breaking using 3d lattice simulations, and develop a theory of tachyonic preheating, which occurs due to the spinodal instability of the scalar field.
A. A. Anselm   +23 more
core   +3 more sources

An oscillation criterion for inhomogeneous Stieltjes integro-differential equations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1994
The aim of the paper is to give an oscillation theorem for inhomogeneous Stieltjes integro-differential equation of the form p(t)x′+∫atx(s)dσ=f(t). The paper generalizes the author's work [2].
M. A. El-Sayed
doaj   +1 more source

Non-oscillation of half-linear differential equations with periodic coefficients

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2015
We consider half-linear Euler type differential equations with general periodic coefficients. It is well-known that these equations are conditionally oscillatory, i.e., there exists a border value given by their coefficients which separates oscillatory ...
Petr Hasil, Michal Veselý
doaj   +1 more source

Numerical study of vortex-induced vibrations of flexible riser under top oscillation excitation

open access: yesZhongguo Jianchuan Yanjiu, 2022
ObjectiveThe viv-FOAM-SJTU solver is used to carry out the numerical simulation of the vortex induced vibrations of a riser under different top oscillation excitation amplitudes. MethodsThe flow field is computed by the strip theory and Reynolds-averaged
Hao HU, Jianwei WU, Decheng WAN
doaj   +1 more source

Quasinormal modes of stringy black holes [PDF]

open access: yes, 2001
String theory is a promising candidate for a fundamental quantum theory of all interactions including Einstein gravity. Some solutions in string theory can be interpreted as black holes. Using the semi-analytic method and WKB method,the quasinormal modes(
Candelas   +21 more
core   +1 more source

Design of Driving Waveform for Shortening Response Time of Black Particles and White Particles in Three-Color Electrophoretic Displays

open access: yesMicromachines, 2021
The shortage of color in traditional electrophoretic displays (EPDs) can be compensated by three-color EPDs. However, the response time of black particles and white particles is increased. A new driving waveform based on the principle of three-color EPDs
Hu Zhang   +11 more
doaj   +1 more source

Second-order impulsive differential systems with mixed and several delays

open access: yesAdvances in Difference Equations, 2021
In this work, we present new necessary and sufficient conditions for the oscillation of a class of second-order neutral delay impulsive differential equations.
Shyam Sundar Santra   +4 more
doaj   +1 more source

Tests of Basic Quantum Mechanics in Oscillation Experiments [PDF]

open access: yes, 1997
According to standard quantum theory, the time evolution operator of a quantum system is independent of the state of the system. One can, however, consider systems in which this is not the case: the evolution operator may depend on the density operator ...
D'Espagnat B   +7 more
core   +2 more sources

On the oscillation of q-fractional difference equations

open access: yesAdvances in Difference Equations, 2017
In this paper, sufficient conditions are established for the oscillation of solutions of q-fractional difference equations of the form { ∇ 0 α q x ( t ) + f 1 ( t , x ) = r ( t ) + f 2 ( t , x ) , t > 0 , lim t → 0 + q I 0 j − α x ( t ) = b j ( j = 1 , 2
Bahaaeldin Abdalla
doaj   +1 more source

Plane-wave theory of nondegenerate oscillation in the linear photorefractive passive phase-conjugate mirror [PDF]

open access: yes, 1986
We present a plane-wave theory of nondegenerate oscillation in the linear passive (self-pumped) phase-conjugate mirror (PPCM). The circumstances under which the plane-wave theory permits spontaneous nondegenerate oscillation in this and other PPCM's are ...
Cronin-Golomb, Mark, Yariv, Amnon
core   +1 more source

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