Determination of the critical exponents for the λ transition of 4He by high-temperature expansion

被引：39

作者：

Campostrini, M

Pelissetto, A

Rossi, P

Vicari, E

机构：

[1] Univ Pisa, Dipartimento Fis, I-56126 Pisa, Italy

[2] Ist Nazl Fis Nucl, I-56126 Pisa, Italy

[3] Univ Roma 1, Dipartimento Fis, I-00185 Rome, Italy

[4] Ist Nazl Fis Nucl, I-00185 Rome, Italy

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.61.5905

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We determine the critical exponents for the XY universality class in three dimensions, which is expected to describe the lambda transition in He-4. They are obtained from the analysis of high-temperature series computed for a two-component lambda phi(4) model. The parameter lambda is fixed such that the leading corrections to scaling vanish. We obtain v= 0.67166(55), gamma= 1.3179(11), and alpha= -0.0150(17). These estimates improve previous theoretical determinations and agree with the more precise experimental results for liquid helium.

引用

页码：5905 / 5908

页数：4

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