Results 71 to 80 of about 467,640 (194)

Finite size scaling in the local abundances of geographic populations

open access: yesBiological Research, 2011
We analyzed the statistical distribution of intra-specific local abundances for a set North American breeding bird species. We constructed frequency plots for every species and found that they showed long-tail power-law behavior, truncated at an upper ...
Sebastián R Abades, Pablo A Marquet
doaj  

Non-universal size dependence of the free energy of confined systems near criticality

open access: yes, 2001
The singular part of the finite-size free energy density $f_s$ of the O(n) symmetric $\phi^4$ field theory in the large-n limit is calculated at finite cutoff for confined geometries of linear size L with periodic boundary conditions in 2 < d < 4 ...
D. Danchev   +21 more
core   +1 more source

Quantum-critical properties of the one- and two-dimensional random transverse-field Ising model from large-scale quantum Monte Carlo simulations

open access: yesSciPost Physics
We study the ferromagnetic transverse-field Ising model with quenched disorder at $T = 0$ in one and two dimensions by means of stochastic series expansion quantum Monte Carlo simulations using a rigorous zero-temperature scheme.
Calvin Krämer, Jan Alexander Koziol, Anja Langheld, Max Hörmann, Kai Phillip Schmidt
doaj   +1 more source

NONPERTURBATIVE APPROACH TO FINITE-SIZE-SCALING OF THE KONDO EFFECT

open access: yesВестник. Серия физическая, 2009
The scaling theory of the free magnetic moments in disordered metals is investigated. A nonperturbative approach to the Kondo effect is developed.
Isa Kh. Zharekeshev
doaj  

Finite size scaling of the 5D Ising model with free boundary conditions

open access: yesNuclear Physics B, 2014
There has been a long running debate on the finite size scaling for the Ising model with free boundary conditions above the upper critical dimension, where the standard picture gives an L2 scaling for the susceptibility and an alternative theory has ...
P.H. Lundow, K. Markström
doaj   +1 more source

Finite size scaling approach to Anderson localisation

open access: yesJournal of Physics C: Solid State Physics, 1981
The Anderson localization problem is studied by a new scaling theory of finite systems which has been proved to be powerful for different phase transition problems [1]. In three dimensions, there is a transition at a critical value Wc of the disorder parameter from a region of exponentially localized states to a region of extended states.
Pichard, J., Sarma, G.
openaire   +1 more source

Finite-size effects in roughness distribution scaling

open access: yes, 2008
We study numerically finite-size corrections in scaling relations for roughness distributions of various interface growth models. The most common relation, which considers the average roughness $$ as scaling factor, is not obeyed in the steady states of ...
A. L. Barabási   +3 more
core   +1 more source

An Investigation of Finite Size Scaling

open access: yesJournal de Physique, 1982
Calculations on finite (or partially finite) systems, such as Monte-Carlo simulations or the diagonalization of a finite transfer matrix, are often extrapolated to the thermodynamic limit by the use of scaling assumptions involving the finite sizes L of the system.
openaire   +1 more source

Tricriticality and finite-size scaling in the triangular Blume-Capel ferromagnet

open access: yesPhysical Review Research
We report on numerical simulations of the two-dimensional spin-1 Blume-Capel ferromagnet embedded in a triangular lattice. Utilizing a range of Monte Carlo and finite-size scaling techniques, we explore several critical aspects along the crystal field ...
Dimitrios Mataragkas   +3 more
doaj   +1 more source

On finite-size spiky strings in AdS 3 × S 3 × T 4 with mixed fluxes

open access: yesJournal of High Energy Physics, 2020
We discuss finite-size corrections to the spiky strings in AdS space which is dual to the long 𝒩 = 4 SYM operators of the form Tr( Δ + J 1 ϕ 1 Δ + J 2 ϕ 2 … Δ + J n ϕ n $$ {\varDelta}_{+}^{J_1}{\phi}_1{\varDelta}_{+}^{J_2}{\phi}_2\dots {\varDelta}_ ...
Sorna Prava Barik   +2 more
doaj   +1 more source

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