Critical Point Field Mixing in an Asymmetric Lattice Gas Model
arXiv:cond-mat/9306042 · doi:10.1007/BF01308815
Abstract
The field mixing that manifests broken particle-hole symmetry is studied for a 2-D asymmetric lattice gas model having tunable field mixing properties. Monte Carlo simulations within the grand canonical ensemble are used to obtain the critical density distribution for different degrees of particle-hole asymmetry. Except in the special case when this asymmetry vanishes, the density distributions exhibit an antisymmetric correction to the limiting scale-invariant form. The presence of this correction reflects the mixing of the critical energy density into the ordering operator. Its functional form is found to be in excellent agreement with that predicted by the mixed-field finite-size-scaling theory of Bruce and Wilding. A computational procedure for measuring the significant field mixing parameter is also described, and its accuracy gauged by comparing the results with exact values obtained analytically.
10 Pages, LaTeX + 8 figures available from author on request, To appear in Z. Phys. B
Cited by in corpus (6)
- Critical point and coexistence curve properties of the Lennard-Jones fluid: A finite-size scaling study
- Simulation studies of fluid critical behaviour
- Chain length dependence of the polymer-solvent critical point parameters
- Tricritical universality in a two-dimensional spin fluid
- Concentration and energy fluctuations in a critical polymer mixture
- Liquid-vapour asymmetry in pure fluids: A Monte Carlo simulation study