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We consider a class of singular Riemannian manifolds, the deformed spheres $S^N_k$, defined as the classical spheres with a one parameter family $g[k]$ of singular Riemannian structures, that reduces for $k=1$ to the classical metric. After…

Mathematical Physics · Physics 2009-11-11 M. Spreafico , S. Zerbini

After a brief survey of zeta function regularization issues and of the related multiplicative anomaly, illustrated with a couple of basic examples, namely the harmonic oscillator and quantum field theory at finite temperature, an…

High Energy Physics - Theory · Physics 2015-06-22 G. Cognola , E. Elizalde , S. Zerbini

Let X be a compact Riemannian manifold of dimension two or three and let P be a point of X. We derive comparison formulas relating the zeta-regularized determinant of an arbitrary self-adjoint extension of (symmetric) Laplace operator with…

Spectral Theory · Mathematics 2016-02-02 Tayeb Aissiou , Luc Hillairet , Alexey Kokotov

We present a direct approach for the calculation of functional determinants of the Laplace operator on balls. Dirichlet and Robin boundary conditions are considered. Using this approach, formulas for any value of the dimension, $D$, of the…

High Energy Physics - Theory · Physics 2016-08-15 M. Bordag , B. Geyer , K. Kirsten , E. Elizalde

We present a calculation of the zeta function and of the functional determinant for a Laplace-type differential operator, corresponding to a scalar field in a higher dimensional de Sitter brane background, which consists of a higher…

High Energy Physics - Theory · Physics 2009-10-09 Antonino Flachi , Alan Knapman , Wade Naylor , Misao Sasaki

In this paper we compute the coefficients of the heat kernel asymptotic expansion for Laplace operators acting on scalar functions defined on the so called spherical suspension (or Riemann cap) subjected to Dirichlet boundary conditions. By…

Mathematical Physics · Physics 2012-08-21 Guglielmo Fucci , Klaus Kirsten

We deduce an explicit closed formula for the zeta-regularized spectral determinant of the Friedrichs Laplacian on the Riemann sphere equipped with arbitrary constant curvature (flat, spherical, or hyperbolic) metric having three conical…

Differential Geometry · Mathematics 2023-10-10 Victor Kalvin

In this paper we applied the contour integral method for the zeta function associated with a differential operator to the Laplacian on a surface of revolution. Using the WKB expansion, we calculated the residues and values of the zeta…

Mathematical Physics · Physics 2015-06-12 Thalia D. Jeffres , Klaus Kirsten , Tianshi Lu

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…

Mathematical Physics · Physics 2009-11-10 G. Ortenzi , M. Spreafico

A Hermite type formula is introduced and used to study the zeta function over the real and complex n-projective space. This approach allows to compute the residua at the poles and the value at the origin as well as the value of the…

Functional Analysis · Mathematics 2007-05-23 Mauro Spreafico

Compact polyhedral surfaces (or, equivalently, compact Riemann surfaces with conformal flat conical metrics) of an arbitrary genus are considered. After giving a short self-contained survey of their basic spectral properties, we study the…

Differential Geometry · Mathematics 2009-06-04 Alexey Kokotov

Let $X$ be a Riemann surface of genus $g\ge 1$ endowed with a flat conical metric $m$ and let ${\rm det}\,\Delta$ be the $\zeta$-regularized determinant of the Friedrichs Laplacian on $(X,m)$. We derive variational formulas for ${\rm…

Differential Geometry · Mathematics 2025-05-20 Dmitrii Korikov , Alexey Kokotov

In this paper we discuss the BFK type gluing formula for zeta-determinants of Laplacians with respect to the Robin boundary condition on a compact Riemannian manifold. As a special case, we discuss the gluing formula with respect to the…

Differential Geometry · Mathematics 2023-07-04 Klaus Kirsten , Yoonweon Lee

In this paper we compute the small mass expansion for the functional determinant of a scalar Laplacian defined on the bounded, generalized cone. In the framework of zeta function regularization, we obtain an expression for the functional…

High Energy Physics - Theory · Physics 2014-11-20 Guglielmo Fucci , Klaus Kirsten

On a compact Riemannian manifold $M$ with boundary $Y$, we express the log of the zeta-determinant of the Dirichlet-to-Neumann operator acting on $q$-forms on $Y$ as the difference of the log of the zeta-determinant of the Laplacian on…

Differential Geometry · Mathematics 2024-04-24 Klaus Kirsten , Yoonweon Lee

We find an explicit expression for the zeta-regularized determinant of (the Friedrichs extension) of the Laplacian on a compact Riemann surface of genus one with conformal metric of curvature $1$ having a single conical singularity of angle…

Differential Geometry · Mathematics 2017-12-15 Victor Kalvin , Alexey Kokotov

Let M be a compact closed n-dimensional manifold. Given a Riemannian metric on M, we consider the zeta function Z(s) for the de Rham Laplacian and the Bochner Laplacian on p-forms. The hessian of Z(s) with respect to variations of the…

Spectral Theory · Mathematics 2007-05-23 Kate Okikiolu , Caitlin Wang

We study the regularized determinant of the Laplacian as a functional on the space of Mandelstam diagrams (noncompact translation surfaces glued from finite and semi-infinite cylinders). A Mandelstam diagram can be considered as a compact…

Spectral Theory · Mathematics 2013-12-03 Luc Hillairet , Victor Kalvin , Alexey Kokotov

Let M be a compact manifold without boundary. Associated to a metric g on M there are various Laplace operators, for example the de Rham Laplacian on forms and the conformal Laplacian on functions. For a general Laplace type operator we…

Spectral Theory · Mathematics 2007-05-23 Kate Okikiolu

We discuss a specific class of regular-singular Laplace-type operators with matrix coefficients. Their zeta determinants were studied by K. Kirsten, P. Loya and J. Park on the basis of the Contour integral method, with general boundary…

Mathematical Physics · Physics 2020-04-14 Boris Vertman
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