Non-existence of spontaneous magnetization in a one-dimensional Ising ferromagnet

Non-existence of spontaneous magnetization in a one-dimensional Ising ferromagnet
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一维伊辛铁磁体不存在自发磁化

DOI:
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发表时间:
1969
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影响因子:
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通讯作者:
F. Dyson
F. Dyson
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文献类型:
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作者:
F. Dyson

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摘要证明了具有相互作用能的无限线性自旋链μj=±1 $$H = - \Sigma J(i - j)\mu _i \mu _j $$ 在所有有限温度下自发磁化强度为零,前提是j (n)是非负的,那 $$H = - \Sigma J(i - j)\mu _i \mu _j $$ . 这表明,当和Σn J (n)收敛时,ruelle定理建立了不存在长程阶,这并不是最好的可能。
AbstractIt is proved that an infinite linear chain of spins μj=±1, with an interaction energy $$H = - \Sigma J(i - j)\mu _i \mu _j $$ has zero spontaneous magnetization at all finite temperatures, provided thatJ (n) is non-negative and that $$H = - \Sigma J(i - j)\mu _i \mu _j $$ . This shows that a theorem ofRuelle, establishing the absence of long-range order when the sum Σn J (n) converges, is not the best possible.