Vacuum energy, spectral determinant and heat kernel asymptotics of graph Laplacians with general vertex matching conditions

Abstract

We consider Laplace operators on metric graphs, networks of one-dimensional line segments (bonds), with matching conditions at the vertices that make the operator self-adjoint. Such quantum graphs provide a simple model of quantum mechanics in a classically chaotic system with multiple scales corresponding to the lengths of the bonds. For graph Laplacians we briefly report results for the spectral determinant, vacuum energy and heat kernel asymptotics of general graphs in terms of the vertex matching conditions.

5 pages, submitted to proceedings of QFEXT09, minor corrections made.

References in corpus (1)

• Zeta functions of quantum graphs

Cited by in corpus (4)

• Finite pseudo orbit expansions for spectral quantities of quantum graphs
• Spectral determinants and zeta functions of Schrödinger operators on metric graphs
• An exact trace formula and zeta functions for an infinite quantum graph with a non-standard Weyl asymptotics
• Finite deficiency indices and uniform remainder in Weyl's law