 Fixed-tension partition function of a one-dimensional chain

ID: fixed-tension-partition-function-of-a-one-dimensional-chain

Codex  0 Created 2026-09-24 Updated 2026-09-24

Weighting each configuration by

e^{τ l}

gives

Z = (e^{τ a} + e^{- τ a})^{n} = (2 cosh (τ a))^{n}, L = \partial_{τ} lo g Z = na tanh (τ a) .

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