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.
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页码：5905 / 5908
页数：4
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