Quantum critical behavior in three dimensional lattice Gross-Neveu models

被引：62

作者：

Chandrasekharan, Shailesh ^{[1
]}

Li, Anyi ^{[2
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

[2] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW D | 2013年 / 88卷 / 02期

关键词：

4-FERMION INTERACTION; CRITICAL EXPONENTS; THIRRING MODEL; FIELD-THEORY; PHASE;

D O I：

10.1103/PhysRevD.88.021701

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study quantum critical behavior in three dimensional lattice Gross-Neveu models containing two four-component massless Dirac fermions. We focus on two models with SU(2) flavor symmetry and either a Z(2) or a U(1) chiral symmetry. Both models could not be studied earlier due to sign problems. We use the fermion bag approach which is free of sign problems and compute critical exponents at the phase transitions. We estimate nu = 0.83(1), eta = 0.62(1), eta(psi) = 0.38(1) in the Z(2) and nu = 0.849(8), eta = 0.633(8), eta(psi) = 0.373(3) in the U(1) model.

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页数：5

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