Effective spin systems in coupled micro-cavities

Abstract

We show that atoms trapped in micro-cavities that interact via exchange of virtual photons can model an anisotropic Heisenberg spin-1/2 chain in an external magnetic field. All parameters of the effective Hamiltonian can individually be tuned via external lasers. Since the occupation 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.

5 pages, 4 figures

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