Star graphs and Seba billiards

Abstract

We derive an exact expression for the two-point correlation function for quantum star graphs in the limit as the number of bonds tends to infinity. This turns out to be identical to the corresponding result for certain Seba billiards in the semiclassical limit. Reasons for this are discussed. The formula we derive is also shown to be equivalent to a series expansion for the form factor - the Fourier transform of the two-point correlation function - previously calculated using periodic orbit theory.

24 pages, 3 figures, submitted to J. Phys. A

References in corpus (2)

• Periodic Orbit Theory and Spectral Statistics for Quantum Graphs
• Spectral statistics for unitary transfer matrices of binary graphs

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