High fidelity state transfer in binary tree spin networks

Details High fidelity state transfer in binary tree spin networks High fidelity state transfer in binary tree spin networks

2008-07-25

arxiv.org/abs/0807.4030v2

Physical Review A 79, 022313 (2009)

Physics

Quantum Physics

6 pages, 2 figures

Scientific paper

10.1103/PhysRevA.79.022313

Quantum state propagation over binary tree configurations is studied in the context of quantum spin networks. For binary tree of order two a simple protocol is presented which allows to achieve arbitrary high transfer fidelity. It does not require fine tuning of local fields and two-nodes coupling of the intermediate spins. Instead it assumes simple local operations on the intended receiving node: their role is to brake the transverse symmetry of the network that induces an effective refocusing of the propagating signals. Some ideas on how to scale up these effect to binary tree of arbitrary order are discussed.

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