Entanglement Resonance in Driven Spin Chains
Quantum Physics
2009-03-29 v2
Abstract
We consider a spin-1/2 anisotropic XY model with time-dependent spin-spin coupling as means of creating long-distance entanglement. We predict the emergence of significant entanglement between the first and the last spin whenever the ac part of the coupling has a frequency matching the Zeeman splitting. In particular, we find that the concurrence assumes its maximum with a vanishing dc part. Mapping the time-dependent Hamiltonian within a rotating-wave approximation to an effective static model provides qualitative and quantitative understanding of this entanglement resonance. Numerical results for the duration of the entanglement creation and its length dependence substantiate the effective static picture.
Cite
@article{arxiv.0809.3712,
title = {Entanglement Resonance in Driven Spin Chains},
author = {Fernando Galve and David Zueco and Sigmund Kohler and Eric Lutz and Peter Hänggi},
journal= {arXiv preprint arXiv:0809.3712},
year = {2009}
}
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