منابع مشابه
Critical structure factor in using systems.
We perform a large-scale Monte Carlo simulation of the three-dimensional Ising model on simple cubic lattices of size L(3) with L=128 and 256. We determine the corresponding structure factor (Fourier transform of the two-point function) and compare it with several approximations and with experimental results. We also compute the turbidity as a function of the momentum of the incoming radiation,...
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2014 The critical properties of Ising models on various fractal lattices of the Sierpinski carpet type are studied using numerical simulations. We observe scaling and measure the exponents 03B3 and 03BD which are then compared to the values which have been recently extrapolated from the Wilson-Fisher 03B5-expansion in non integer dimensions. It appears that in the general case an effective dime...
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Two conditions are derived for Ising models to show non-universal critical behaviour, namely conditions concerning 1) logarithmic singularity of the specific heat and 2) degeneracy of the ground state. These conditions are satisfied with the eight-vertex model, the Ashkin-Teller model, some Ising models with shortor long-range interactions and even Ising systems without the translational or the...
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-Using Monte Carlo simulations, we studied the structure factor S (q) of the two-dimensional (2D) random field Ising model (RFIM) with a binary probability distribution. We observe that S (q) changes its lineshape from Lorentzian to a Lorentzian-three half form, ( L R Z ) ~ / ~ as the random field and temperature are lowered. The time dependent structure factor S (q, t ) after a quench from a p...
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Background: It is difficult to provide health care services to all those in need of such services due to limited resources and unlimited demands. Thus, priority setting and rationing have to be applied. This study aimed at critically examining the concept of rationing in health sector and identifying its purposes, influencing factors, mechanisms, and outcomes. Methods: The c...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2002
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.66.026112