Short-time critical dynamics and aging phenomena in the two-dimensional XY model.
With Monte Carlo methods, we simulate dynamic relaxation processes of the two-dimensional XY model at the Berezinskii-Kosterlitz-Thouless phase transition temperature and below, starting from both ordered and disordered initial states. The two-time correlation function A(t',t) is measured, and aging phenomena are investigated. The power-law correction in the spatial correlation length xi(t) for relaxation with an ordered initial state and the logarithmic correction for relaxation with a disordered initial state are carefully analyzed. The scaling functions of A(t',t) are then extracted.
Lei
X W
XW
Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou 310027, People's Republic of China.
Zheng
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