# 重整化群

## 块自旋

1. ${\displaystyle T=0}$${\displaystyle J\to \infty }$。从宏观上来看，温度对系统的影响变得可以忽略不计。这时系统处于铁磁相。
2. ${\displaystyle T\to \infty }$${\displaystyle J\to 0}$。与第1种情形正好相反，温度对系统的影响占据了主导，系统在宏观上变得无序。
3. ${\displaystyle T=T_{c}}$${\displaystyle J=J_{c}}$。在这一特定的状态上，改变系统的标度不改变系统的物理性质，因为系统处于分形态上。这对应居里相变，这个点称为临界点

## 扩展阅读

### 相关著作

• T. D. Lee; Particle physics and introduction to field theory, Harwood academic publishers, 1981, [ISBN 3-7186-0033-1]. Contains a Concise, simple, and trenchant summary of the group structure, in whose discovery he was also involved, as acknowledged in Gell-Mann and Low's paper.
• L.Ts.Adzhemyan, N.V.Antonov and A.N.Vasiliev; The Field Theoretic Renormalization Group in Fully Developed Turbulence; Gordon and Breach, 1999. [ISBN 90-5699-145-0].
• Vasil'ev, A.N.; The field theoretic renormalization group in critical behavior theory and stochastic dynamics; Chapman & Hall/CRC, 2004. [ISBN 9780415310024] (Self-contained treatment of renormalization group applications with complete computations);
• Zinn-Justin, Jean ; Quantum field theory and critical phenomena, Oxford, Clarendon Press (2002), ISBN 0-19-850923-5 (a very thorough presentation of both topics);
• The same author: Renormalization and renormalization group: From the discovery of UV divergences to the concept of effective field theories, in: de Witt-Morette C., Zuber J.-B. (eds), Proceedings of the NATO ASI on Quantum Field Theory: Perspective and Prospective, June 15–26, 1998, Les Houches, France, Kluwer Academic Publishers, NATO ASI Series C 530, 375-388 (1999) [ISBN ]. Full text available in PostScript.
• Kleinert, H. and Schulte Frohlinde, V; Critical Properties of φ4-Theories, World Scientific (Singapore, 2001); Paperback ISBN 981-02-4658-7. Full text available in PDF.