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arXiv 0705.0226hep-phhep-lat
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纯SU(2)退澄清跃迁的Langevin动力学

Langevin dynamics of the pure SU(2) deconfining transition

E. S. Fraga, G. Krein, A. J. Mizher

摘要:

研究了纯SU(2)规范理论中退禁闭跃迁的序参量的耗散实时演化。在淬火到远高于临界温度的温度后接近平衡由朗之万方程描述。为了完全固定的马尔可夫朗之万动力学,我们选择的耗散系数,这是一个温度的函数,由初步的蒙特卡罗模拟的各种温度的指导。假设蒙特卡罗时间和实时之间的关系,我们估计的延迟热化所带来的耗散和噪声。

英文摘要:

We investigate the dissipative real-time evolution of the order parameter for the deconfining transition in the pure SU(2) gauge theory. The approach to equilibrium after a quench to temperatures well above the critical one is described by a Langevin equation. To fix completely the markovian Langevin dynamics we choose the dissipation coefficient, that is a function of the temperature, guided by preliminary Monte Carlo simulations for various temperatures. Assuming a relationship between Monte Carlo time and real time, we estimate the delay in thermalization brought about by dissipation and noise.

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