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arXiv 1612.09211cond-mat.dis-nncond-mat.stat-mech
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六维Ising自旋玻璃的物理观测:临界不动点附近的渐近行为

Physical observables of the Ising spin glass in 6-epsilon dimensions: asymptotical behavior around the critical fixed point

Tamás Temesvári

摘要:

研究了在外加小磁场作用下,零场自旋玻璃相变点附近序参量、复制子和纵向质量等物理量的渐近行为.一个有效场论来模拟这种渐近性,在它的拉格朗日量中包含一个小的扰动,它破坏了零场对称性。一阶重整化群补充微扰结果提供的标度函数。复制子质量的标度函数的微扰零点定义了源于零场固定点的通用Almeida无边界表面。

英文摘要:

The asymptotical behavior of physical quantities, like the order parameter, the replicon and longitudinal masses, is studied around the zero-field spin glass transition point when a small external magnetic field is applied. An effective field theory to model this asymptotics contains a small perturbation in its Lagrangian which breaks the zero-field symmetry. A first order renormalization group supplemented by perturbational results provides the scaling functions. The perturbative zero of the scaling function for the replicon mass defines a generic Almeida-Thouless surface stemming from the zero-field fixed point.

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