Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental Observation of the Spectral Gap in Microwave n-Disk Systems   Symmetry reduced three-disk and five-disk systems are studied in a microwave
setup. Using harmonic inversion the distribution of the imaginary parts of the
resonances is determined. With increasing opening of the systems, a spectral
gap is observed for thick as well as for thin repellers and for the latter case
it is compared with the known topological pressure bounds. The maxima of the
distributions are found to coincide for a large range of the distance to radius
parameter with half of the classical escape rate. This confirms theoretical
predictions based on rigorous mathematical analysis for the spectral gap and on
numerical experiments for the maxima of the distributions.

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The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex