Quantum walk search on Johnson graphs
Quantum walk search on Johnson graphs
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约翰逊图上的量子行走搜索
DOI:
10.1088/1751-8113/49/19/195303
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
T. G. Wong
中科院分区:
文献类型:
--
作者:
T. G. Wong
The Johnson graph J ( n , k ) is defined by n symbols, where vertices are k-element subsets of the symbols, and vertices are adjacent if they differ in exactly one symbol. In particular, J ( n , 1 ) is the complete graph Kn, and J ( n , 2 ) is the strongly regular triangular graph Tn, both of which are known to support fast spatial search by continuous-time quantum walk. In this paper, we prove that J ( n , 3 ) , which is the n-tetrahedral graph, also supports fast search. In the process, we show that a change of basis is needed for degenerate perturbation theory to accurately describe the dynamics. This method can also be applied to general Johnson graphs J ( n , k ) with fixed k.