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The spectrum of asymptotic Cayley trees

Abstract:
We characterize the spectrum of the transition matrix for simple random walk on graphs consisting of a finite graph with a finite number of infinite Cayley trees attached. We show that there is a continuous spectrum identical to that for a Cayley tree and, in general, a non-empty pure point spectrum. We apply our results to studying continuous time quantum walk on these graphs. If the pure point spectrum is nonempty the walk is in general confined with a nonzero probability.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1088/1751-8121/ad469a

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author


Publisher:
IOP Publishing
Journal:
Journal of Physics A: Mathematical and Theoretical More from this journal
Volume:
57
Article number:
215202
Publication date:
2024-05-15
Acceptance date:
2024-05-01
DOI:
EISSN:
1751-8121
ISSN:
1751-8113


Language:
English
Keywords:
Pubs id:
1993825
Local pid:
pubs:1993825
Deposit date:
2024-05-01

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