DESCRIBING ACTUAL CRITICAL-BEHAVIOR FROM FIELD-THEORY - A DELICATE MATTER

被引：24

作者：

BAGNULS, C ^{[1
]}

BERVILLIER, C ^{[1
]}

机构：

[1] CE SACLAY,SERV PHYS THEOR,F-91191 GIF SUR YVETTE,FRANCE

来源：

PHYSICS LETTERS A | 1994年 / 195卷 / 02期

关键词：

D O I：

10.1016/0375-9601(94)90090-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The renormalization flows evolve in a space involving an infinite number of degrees of freedom. This aspect is not conspicuous in the field theoretical version, which only accounts for a specific kind of degrees of freedom. We shortly present and discuss two examples that illustrate the difficulty of going beyond this ''simplification'': (1) The case of negative correction-to-scaling terms in critical behaviour (usually thought to be not describable by held theoretical techniques). (2) The domain of validity of a theoretical constraint on the critical behaviour of the specific heat (namely R(Bcr)) that we had calculated in the framework of field theory and is not a universal quantity in the usual sense.

引用

页码：163 / 170

页数：8

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