Degeneracies in the length spectra of metric graphs
Degeneracies in the length spectra of metric graphs
复制标题
度量图长度谱的简并性
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
U. Smilansky
中科院分区:
文献类型:
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作者:
U. Gavish;U. Smilansky
The spectral theory of quantum graphs is related via an exact trace formula to the spectrum of the lengths of periodic orbits (cycles) on the graphs. The latter is a degenerate spectrum, and understanding its structure (i.e., finding how many different lengths exist for periodic orbits with a given period and the average number of periodic orbits with the same length) is necessary for the systematic study of spectral fluctuations using the trace formula. This is a combinatorial problem which we solve exactly for complete (fully connected) graphs with arbitrary number of vertices.