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The electronic entanglement between two free atoms initially at rest isobtained including the effects of photon recoil, for the case when quantumdispersion can be neglected during the atomic excited-state lifetime. Differentfrom previous treatments using common or statistically independent reservoirs,a continuous transition between these limits is observed, that depends on theinter-atomic distance and degree of localization. The occurrence ofentanglement sudden death and birth as predicted here deviates from the casewhere the inter-atomic distance is treated classically by a static value.Moreover, the creation of a dark state is predicted, which manifests itself bya stationary entanglement that even may be created from an initially separablestate.

Dynamics of entanglement between two free atoms with quantized motion