Abstract
We have investigated theoretically a deterministic method for preparing arbitrary multi-atom symmetric Dicke states in cavity quantum electrodynamics (QED) via combining quantum Zeno dynamics with adiabatic passage. By quantitatively discussing the case of N=4, we show that all these states are robust against both the loss of cavity and atomic spontaneous emission, since no cavity-photon or excited level of atom is populated during the whole operation. Meanwhile, the interaction time does not change with the variation of excitation number l of |D4(l)⟩ (l=1, 2, 3). Furthermore, the operating time for creating arbitrary N-atom symmetric Dicke states |DN(m)⟩ is just the same as the one for preparing |D4(l)⟩. This particular feature would reduce the complexity for achieving Dicke states in experimental operation.
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