Prog. Theor. Phys. Supplement No.138 (2000) pp. 555-560
Non-Equilibrium Relaxation of Fluctuation
1Department of Applied Physics, School of Engineering,
The University of Tokyo, Tokyo 113-8656, Japan
2Department of Physics, Tokyo Institute of Technology, Tokyo
3Institute for Solid State Physics, The University of Tokyo, Tokyo
(Received October 20, 1999)
It is shown that the non-equilibrium relaxation (NER) process of the
order-parameter and energy is useful to study the phase transition.
By observing the log-derivatives of
those decay functions, the critical point is located finely and
the critical exponents are estimated accurately.
The major advantage of NER method is it's simplicity; not only the behavior
in the large-size limit can be observed easily, but also it is not
necessary to pursue the equilibrium of the system to get information
of the final equilibrium state. Applications are
expanding from basic systems like Ising ferromagnets, to spin-glass,
quantal system, chiral and KT transitions, and so on.
Now the NER process of fluctuations is
also expected to share those advantages. It is found that the
combinations of the NER functions of some
fluctuations provide the way to determine static and dynamics critical
DOI : 10.1143/PTPS.138.555
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Citing Article(s) :
Journal of the Physical Society of Japan 69 (2000) pp. 1931-1934
Nonequilibrium Relaxation of Fluctuations of Physical Quantities
Nobuyasu Ito, Koji Hukushima, Keita Ogawa and Yukiyasu Ozeki