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Topics in Statistic Mechanics

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Adv. Sta. Phy. Homework Class Homework Li,Zimeng PB06203182<br />

PB06203182 Advanced <strong>Statistic</strong> Physics Homework 1<br />

By Maple 13<br />

1.Derive the correlation function of Is<strong>in</strong>g model with variable r or N.<br />

Ans:<br />

[1]Tak<strong>in</strong>g free border condition,def<strong>in</strong>e<br />

,then<br />

So, Z=<br />

Correlation Function:G[N]=<<br />

is correlation length,<br />

Thus, we can plot the relation of correlation function and r or N

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