Leading off-diagonal correction to the form factor of large graphs
Berkolaiko, G. and Shanz, H. and Whitney, R.S. (2002) Leading off-diagonal correction to the form factor of large graphs. Physical Review Letters, 88 (10). p. 104101. ISSN 1079-7114 (http://dx.doi.org/10.1103/PhysRevLett.88.104101)
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Using periodic-orbit theory beyond the diagonal approximation we investigate the form factor, K(τ), of a generic quantum graph with mixing classical dynamics and time-reversal symmetry. We calculate the contribution from pairs of self-intersecting orbits that differ from each other only in the orientation of a single loop. In the limit of large graphs, these pairs produce a contribution -2τ2 to the form factor which agrees with random-matrix theory.
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Item type: Article ID code: 2058 Dates: DateEvent11 February 2002PublishedSubjects: Science > Mathematics Department: Faculty of Science > Mathematics and Statistics > Mathematics Depositing user: Strathprints Administrator Date deposited: 14 Jan 2007 Last modified: 11 Nov 2024 08:22 URI: https://strathprints.strath.ac.uk/id/eprint/2058
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