玻茨模型
外觀
在統計力學中,玻茨模型(Potts模型)是易辛模型的推廣,它描述晶格上的自旋。 玻茨模型可應用於鐵磁性和固態物理學。
定義
[編輯]玻茨模型的哈密頓量是:
其中 是晶格上的自旋變數, δ(si, sj) 是克羅內克函數。 當 si = sj 時,該函數等於1,否則等於0。
q=2的玻茨模型等於易辛模型(Jp = -2Jc )。
有時會引入磁場h:
相關條目
[編輯]參考文獻
[編輯]- Ashkin, Julius; Teller, Edward. Statistics of Two-Dimensional Lattices With Four Components. Phys. Rev. 1943, 64 (5–6): 178–184. Bibcode:1943PhRv...64..178A. doi:10.1103/PhysRev.64.178.
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