Results 101 to 110 of about 4,999,006 (239)

Ground state solutions for fractional Schrödinger equations with critical Sobolev exponent

open access: yes, 2016
In this paper, we establish the existence of ground state solutions for fractional Schrodinger equations with a critical exponent. The methods used here are based on the $s-$harmonic extension technique of Caffarelli and Silvestre, the concentration ...
K. Teng, Xiumei He
semanticscholar   +1 more source

Random Transverse Field Ising model in $d=2$ : analysis via Boundary Strong Disorder Renormalization

open access: yes, 2012
To avoid the complicated topology of surviving clusters induced by standard Strong Disorder RG in dimension $d>1$, we introduce a modified procedure called 'Boundary Strong Disorder RG' where the order of decimations is chosen a priori.
Garel, Thomas, Monthus, Cecile
core   +4 more sources

Problem with Critical Sobolev Exponent and with Weight [PDF]

open access: yesChinese Annals of Mathematics, Series B, 2007
We study existence results for a problem with criticical Sobolev exponent and with a positive weight.
Hadiji, Rejeb, Yazidi, Habib
openaire   +5 more sources

Existence and multiplicity of solutions for Kirchhoff type problem with critical exponent

open access: yes, 2013
In the present paper, the existence and multiplicity of solutions for Kirchhoff type problem involving critical exponent with Dirichlet boundary value conditions are obtained via the variational method.
Qilin Xie, Xing-Ping Wu, Chunlei Tang
semanticscholar   +1 more source

Critical exponent of a quantum-noise-driven phase transition: The open-system Dicke model [PDF]

open access: yes, 2011
The quantum phase transition of the Dicke model has been observed recently in a system formed by motional excitations of a laser-driven Bose-Einstein condensate coupled to an optical cavity [Baumann et al., Nature (London) 464, 1301 (2010)].
D. Nagy, G. Szirmai, P. Domokos
semanticscholar   +1 more source

The Critical Exponent $\theta'$ in Spin Glasses

open access: yes, 1999
Short-time dynamic scaling behavior of the 3D $\pm J$ Ising spin glass is studied by Monte Carlo methods. Starting the replicas with independent initial configurations with a small pseudo magnetization, the dynamic evolution of the overlap q(t) between ...
Luo, H. J., Schuelke, L., Zheng, B.
core   +2 more sources

Interplay of quantum and classical fluctuations near quantum critical points

open access: yes, 2011
For a system near a quantum critical point (QCP), above its lower critical dimension $d_L$, there is in general a critical line of second order phase transitions that separates the broken symmetry phase at finite temperatures from the disordered phase ...
A Paduan-Filho   +44 more
core   +1 more source

Climate persistence and memory

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2020
The autocorrelation function (ACF) and its relationship to fluctuation analysis (FA) are discussed, based on the reanalysis monthly mean geopotential height at 500 hPa from ECMWF (ERA-20C).
Jiangnan Li, Zhian Sun
doaj   +1 more source

Dynamic Critical approach to Self-Organized Criticality

open access: yes, 2005
A dynamic scaling Ansatz for the approach to the Self-Organized Critical (SOC) regime is proposed and tested by means of extensive simulations applied to the Bak-Sneppen model (BS), which exhibits robust SOC behavior.
Alejandro F. Rozenfeld   +4 more
core   +1 more source

Critical exponent for the density of percolating flux [PDF]

open access: yesNuclear Physics B - Proceedings Supplements, 1994
This paper is a study of some of the critical properties of a simple model for flux. The model is motivated by gauge theory and is equivalent to the Ising model in three dimensions. The phase with condensed flux is studied. This is the ordered phase of the Ising model and the high temperature, deconfined phase of the gauge theory. The flux picture will
openaire   +6 more sources

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