Fluctuation–dissipation relations in critical coarsening: crossover from unmagnetized to magnetized initial states
نویسندگان
چکیده
منابع مشابه
Slow dynamics in critical ferromagnetic vector models relaxing from a magnetized initial state
Within the universality class of ferromagnetic vector models with O(n) symmetry and purely dissipative dynamics, we study the non-equilibrium critical relaxation from a magnetized initial state. Transverse correlation and response functions are exactly computed for Gaussian fluctuations and in the limit of infinite number n of components of the order parameter. We find that the fluctuation-diss...
متن کاملCritical percolation in bidimensional coarsening
I discuss a recently unveiled feature in the dynamics of two dimensional coarsening systems on the lattice with Ising symmetry: they first approach a critical percolating state via the growth of a new length scale, and only later enter the usual dynamic scaling regime. The time needed to reach the critical percolating state diverges with the system size. These observations are common to Glauber...
متن کاملCoarsening Rates in Off-Critical Mixtures
Abstract. We study coarsening of a binary mixture within the Mullins-Sekerka evolution in the regime where one phase has small volume fraction φ ¿ 1. Heuristic arguments suggest that the energy density, which represents the inverse of a typical length scale, decreases as φt−1/3 as t → ∞. We prove rigorously a corresponding weak lower bound. Moreover, we establish a stronger result for the two-d...
متن کاملCrossover scaling from classical to non-classical critical behaviour
Interacting physical systems in the neighborhood of criticality (and massive continuum field theories) can often be characterized by just two physical scales: a (macroscopic) correlation length and a (microscopic) interaction range, related to the coupling and measured by the Ginzburg number G. A critical crossover limit can be defined when both scales become large while their ratio stays finit...
متن کاملNature of crossover from classical to Ising-like critical behavior
We present an accurate numerical determination of the crossover from classical to Ising-like critical behavior upon approach of the critical point in three-dimensional systems. The possibility of varying the Ginzburg number in our simulations allows us to cover the entire crossover region. We employ these results to scrutinize several semiphenomenological crossover scaling functions that are wi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics A: Mathematical and Theoretical
سال: 2008
ISSN: 1751-8113,1751-8121
DOI: 10.1088/1751-8113/41/13/135001