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A new mechanism is proposed for dissipatively preparing maximal Bellentangled state of two atoms in an optical cavity. This scheme integrates thespontaneous emission, the light shift of atoms in the presence of dispersivemicrowave field, and the quantum Zeno dynamics induced by continuous coupling,to obtain a unique steady state irrespective of initial state. Even for a largecavity decay, a high-fidelity entangled state is achievable at a shortconvergence time, since the occupation of cavity mode is inhibited by the Zenorequirement. Therefore, a low single-atom cooperativity $C=g^2/(\kappa\gamma)$is good enough for realizing a high fidelity of entanglement in a wide range ofdecoherence parameters. As a straightforward extension, the feasibility forpreparation of two-atom Knill-Laflamme-Milburn state with the same mechanism isalso discussed.

Engineering steady-state entanglement via dissipation and quantum Zeno dynamics in optical cavity