Thermal fluctuation for the time-dependent Ginzburg-Landau simulations is considered on the basis of the ensemble theory and the fluctuation-dissipation relation. The treatment for evaluating the thermal fluctuation for a nonconserved system is proposed and the formula for the fluctuation is presented. The magnitude of the fluctuation depends on the coarse-grained volume and the curvature of the free-energy function at thermal equilibrium. The validity of the formula is verified by numerical simulation.
Physical Review E
- Pub Date:
- June 2001
- Thermodynamic functions and equations of state;
- General theory of equations of state and phase equilibria;
- Phase transitions: general studies;
- Solid-solid transitions