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arXiv 1608.07075cond-mat.stat-mech
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流体动力学涨落对临界动力学模型E和F中相变的影响

Influence of Hydrodynamic Fluctuations on the Phase Transition in Models E and F of Critical Dynamics

M. Dančo, M. Hnatich, M. V. Komarova, D. M. Krasnov, T. Lučivjanský, L. Mižišin, M. Yu. Nalimov

摘要:

本文用重整化群方法研究了由随机纳维-斯托克斯方程产生的速度涨落作用下的临界动力学模型E。利用Martin-Siggia-Rose定理,我们得到了一个允许微扰重整化群分析的场论模型。通过直接功率计数和紫外发散的分析,我们证明了该模型是可倍增重整化的,并使用$\varepsilon$和$δ$中的双参数展开计算了重整化常数.这里,$\varepsilon$是与临界尺寸4的偏差,而$δ$是与柯尔莫哥洛夫状态的偏差。我们给出了单圈近似和部分不动点结构的结果。我们简要地讨论了速度涨落对模型大尺度行为的可能影响。

英文摘要:

We use the renormalization group method to study model E of critical dynamics in the presence of velocity fluctuations arising in accordance with the stochastic Navier-Stokes equation. Using Martin-Siggia-Rose theorem, we obtain a field- theoretical model that allows a perturbative renormalization group analysis. By direct power counting and an analysis of ultraviolet divergences, we show that the model is multiplicatively renormalizable, and we use a two-parameter expansion in $\varepsilon$ and $δ$ to calculate renormalization constants. Here, $\varepsilon$ is a deviation from the critical dimension four, and $δ$ is a deviation from the Kolmogorov regime. We present the results of the one-loop approximation and part of the fixed-point structure. We briefly discuss the possible effect of velocity fluctuations on the large-scale behavior of the model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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