Two phase transitions in chiral Gross-Neveu model in 2+ε dimensions at low N

被引：21

作者：

Kleinert, H ^{[1
]}

Babaev, E ^{[1
]}

机构：

[1] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany

来源：

PHYSICS LETTERS B | 1998年 / 438卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(98)00983-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the chiral Gross-Neveu model in 2 + epsilon dimensions has for a small number N of fermions two phase transitions corresponding to pair formation and pair condensation. In the first transition, fermions and antifermions acquire spontaneously a mass and are bound to pairs which behave like a Bose liquid in a chirally symmetric state. In the second transition, the Bose liquid condenses into a coherent state which breaks chiral symmetry. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：311 / 320

页数：10

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