Effect of perturbations on information transfer in spin chains

Details Effect of perturbations on information transfer in spin chains Effect of perturbations on information transfer in spin chains

2010-07-27

arxiv.org/abs/1007.4746v3

Phys. Rev. A 83, 012325 (2011)

Physics

Quantum Physics

Journal version fixes last typos

Scientific paper

10.1103/PhysRevA.83.012325

Spin chains have been proposed as a reliable and convenient way of transferring information and entanglement in a quantum computational context. Nonetheless, it has to be expected that any physical implementation of these systems will be subject to several perturbative factors which could potentially diminish the transfer quality. In this paper, we investigate a number of possible fabrication defects in the spin chains themselves as well as the effect of non-synchronous or imperfect input operations, with a focus on the case of multiple excitation/qubit transfer. We consider both entangled and unentangled states, and in particular the transfer of an entangled pair of adjacent spins at one end of a chain under the mirroring rule and also the creation of entanglement resulting from injection at both end spins.

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