Perfect transfer of m-qubit GHZ states
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By using some techniques such as spectral distribution and stratification associated with the graphs, employed in [1,2] for the purpose of Perfect state transfer (PST) of a single qubit over antipodes of distance-regular spin networks and PST of a $d$-level quantum state over antipodes of pseudo-distance regular networks, PST of an m-qubit GHZ state is investigated. To do so, we employ the particular distance-regular networks (called Johnson networks) J(2m,m) to transfer an m-qubit GHZ state initially prepared in an arbitrary node of the network (called the reference node) to the corresponding antipode, perfectly.
Keywords: Perfect state transferenc, GHZ states, Johnson network, Stratification, Spectral distribution
PACs Index: 01.55.+b, 02.10.Yn
17 pages
17 pages