Geometry and Curvature of Spin Networks

Details Geometry and Curvature of Spin Networks Geometry and Curvature of Spin Networks

2011-02-16

arxiv.org/abs/1102.3208v1

Physics

Quantum Physics

6 pages, several figures and tables, IEEE tex

Scientific paper

10.1109/CCA.2011.6044395

A measure for the maximum quantum information transfer capacity (ITC) between nodes of a spin network is defined, and shown to induce a metric on a space of equivalence classes of nodes for homogeneous chains with XX and Heisenberg couplings. The geometry and curvature of spin chains with respect of this metric are studied and compared to the physical network geometry. For general networks hierarchical clustering is used to elucidate the proximity of nodes with regard to the maximum ITC. Finally, it is shown how minimal control can be used to overcome intrinsic limitations and speed up information transfer.

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