Abstract
We propose a relatively robust scheme to generate controllable (deterministic) atomic entangled GHZ states in atom-cavity-fiber system by adiabatic passage. In the present scheme, the atoms are individually trapped in N spatially separated optical cavities coupled by optical fibers. Losses due to the cavity decay are efficiently suppressed by employing the adiabatic passage technique and appropriately designed atom-field couplings. We consider N five-level atoms simultaneously interacting with N resonant one-mode cavity to reach the N-atom GHZ state of the present system. The influence of various decoherence processes such as spontaneous emission and photon loss on the fidelity is also investigated. It is found that our schemes can be realized with high fidelity even when these decoherence processes are considered.
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