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Zeta function regularization for a scalar field in a compact domain

G. Ortenzi·M. Spreafico
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Abstract

We express the zeta function associated to the Laplacian operator on $S^1_r\times M$ in terms of the zeta function associated to the Laplacian on $M$, where $M$ is a compact connected Riemannian manifold. This gives formulas for the partition function of the associated physical model at low and high temperature for any compact domain $M$. Furthermore, we provide an exact formula for the zeta function at any value of $r$ when $M$ is a $D$-dimensional box or a $D$-dimensional torus; this allows a rigorous calculation of the zeta invariants and the analysis of the main thermodynamic functions associated to the physical models at finite temperature.

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G. Ortenzi, M. Spreafico. 2004-10-06. Zeta function regularization for a scalar field in a compact domain. https://doi.org/10.1088/0305-4470/37/47/018

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