Recently it has been claimed that ordinary perturbation theory (OPT) gives incorrect weak coupling expansions for lattice O( N) non-linear sigma models in the infinite volume limit, and in particular that the two-dimensional non-abelian models are not asymptotically free, contrary to previous ...
Berenyia, Region of validity of perturbation theory for dielectrics and finite conductors, Waves Random Complex Media 5 (1995), pp. 305-327.Region of validity of perturbation theory for dielectrics and finite conductors. M.-J. Kim,H.M. Berenyi,R.E. Burge,S. Tajbakhsh. Waves in Random ...
The region of validity of perturbation theory[J].Waves in Random Media, 1993,3(4) :325 - 342.M.-J. Kim,Andrew J. Stoddart.The region of validity of perturbation theory.Waves in Random Media. 1993M-J Kim,A. J Stoddart.The region of validity of perturbation theory.Waves in Random ...
Conditionally extended validity of perturbation theory: Persistence of AdS stability islands 来自 钛学术 喜欢 0 阅读量: 28 公开/公告号: 10.1103/PhysRevD.92.083013 发明人: F Dimitrakopoulos,IS Yang 关键词: Relativity and gravitation 被引量: 16 摘要: DOI: ...
impurities’ spin angular momentum are computed for times that well exceed the time window of validity of perturbation theory. On the other hand, we find that within time ranges of physical interest, the truncation scheme introduces negative populations which represents a serious methodological draw...
Validity ranges of Lie canonical perturbation theory (LCPT) are investigated in terms of non-blow-up regions. We investigate how the validity ranges depend on the perturbation order in two systems, one of which is a simple Hamiltonian system with one degree of freedom and the other is a HCN...
nonlinear stability theorymodulation equationsapproximation on a long time scaleerror estimatesThe famous Ginzburg-Landau equation describes nonlinear amplitude modulations of a wave perturbation of a basic pattern when a control parameter R lies in the unstable region O ( 蔚 2 ) away from the ...
Inspired by the recent results regarding whether the Harris criterion is valid for quantum spin systems, we have simulated a two-dimensional spin-1/2 Heisenberg model on the square lattice with a specific kind of quenched disorder using the quantum Monte Carlo (QMC) calculations. In particular, ...
In this domain forces and concentrations remain close to their equilibrium values, and linear perturbation methods apply to include the effect of small external voltages. Close to minima or maxima of the concentration, however, the concentration gradients are necessarily small. Here, the electric ...
Such a splitting is exclusively caused by a perturbation operator, which is given as the scalar product of the two gradient derivatives applied to a bound and continuum states. The action of this potential operator yields two terms and each of them gives a separate Thomas peak at the same ...