arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.2289cond-mat.stat-mechhep-th
收藏

Kardar-Parisi-Zhang方程的非微扰重整化群:一般框架和首次应用

Non-perturbative renormalisation group for the Kardar-Parisi-Zhang equation: general framework and first applications

Léonie Canet, Hugues Chaté, Bertrand Delamotte, Nicolás Wschebor

摘要:

我们提出了一种分析方法,植根于非微扰重整化群,它允许一个计算的临界指数和相关性和响应函数的Kardar-Parisi-Zhang(KPZ)的增长方程在其所有不同的制度,包括强耦合的。我们分析了KPZ问题的对称性,并推导出满足线性实现的近似方案。我们实现了这个计划在响应字段中的最小顺序,并表明,它产生一个完整的,定性正确的相图在所有维度,在物理尺寸的临界指数的合理值。我们还计算在一维的完整(动量和频率相关)的关联函数,以及相关的通用标度函数。我们发现一个很好的定量协议的确切结果Praehofer和Spohn(J. Stat. 115(2004))。我们强调,所有这些结果,可以系统地改进,得到与唯一的输入裸作用及其对称性,没有进一步假设的存在的标度或形式的标度函数。

英文摘要:

We present an analytical method, rooted in the non-perturbative renormalization group, that allows one to calculate the critical exponents and the correlation and response functions of the Kardar-Parisi-Zhang (KPZ) growth equation in all its different regimes, including the strong-coupling one. We analyze the symmetries of the KPZ problem and derive an approximation scheme that satisfies the linearly realized ones. We implement this scheme at the minimal order in the response field, and show that it yields a complete, qualitatively correct phase diagram in all dimensions, with reasonable values for the critical exponents in physical dimensions. We also compute in one dimension the full (momentum and frequency dependent) correlation function, and the associated universal scaling functions. We find an excellent quantitative agreement with the exact results from Praehofer and Spohn (J. Stat. Phys. 115 (2004)). We emphasize that all these results, which can be systematically improved, are obtained with sole input the bare action and its symmetries, without further assumptions on the existence of scaling or on the form of the scaling function.

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。

↑