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Phys Rev Lett. 2007 Oct 19;99(16):160501. Epub 2007 Oct 15.

Effective spin systems in coupled microcavities.

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  • 1Institute for Mathematical Sciences, Imperial College London, SW7 2PG, United Kingdom.


We show that atoms trapped in microcavities that interact via the exchange of virtual photons can model an anisotropic Heisenberg spin-1/2 lattice in an external magnetic field. All parameters of the effective Hamiltonian can individually be tuned via external lasers. Since the occupations of excited atomic levels and photonic states are strongly suppressed, the effective model is robust against decoherence mechanisms, has a long lifetime, and its implementation is feasible with current experimental technology. The model provides a feasible way to create cluster states in these devices.

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