Noise-resistant entanglement of strongly interacting spin systems

Details Noise-resistant entanglement of strongly interacting spin systems Noise-resistant entanglement of strongly interacting spin systems

2007-03-05

arxiv.org/abs/cond-mat/0703108v1

Physics

Condensed Matter

Other Condensed Matter

5 Pages, 3 Figures

Scientific paper

We propose and analyze a scheme that makes use of interactions between spins to protect certain correlated many-body states from decoherence. The method exploits the finite energy gap of properly designed Hamiltonians to generate a manifold insensitive to local noise fluctuations. We apply the scheme to achieve decoherence-resistant generation of many particle GHZ states and show that it can improve the sensitivity in precision spectroscopy with trapped ions. Finally we also show that cold atoms in optical lattices interacting via short range interactions can be utilized to engineer the required long range interactions for a robust generation of entangled states.

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