Spectral statistics of nearly unidirectional quantum graphs
Spectral statistics of nearly unidirectional quantum graphs
复制标题
近单向量子图的谱统计
DOI:
10.1088/1751-8113/48/34/345101
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
B. Gutkin
中科院分区:
文献类型:
--
作者:
M. Akila;B. Gutkin
The energy levels of a quantum graph with time reversal symmetry and unidirectional classical dynamics are doubly degenerate and obey the spectral statistics of the Gaussian unitary ensemble. These degeneracies, however, are lifted when the unidirectionality is broken in one of the graph's vertices by a singular perturbation. Based on a random matrix model we derive an analytic expression for the nearest neighbour distribution between energy levels of such systems. As we demonstrate the result agrees excellently with the actual statistics for graphs with a uniform distribution of eigenfunctions. Yet, it exhibits quite substantial deviations for classes of graphs which show strong scarring.
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DOI:
--
发表时间:
2008
期刊:
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作者:
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