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We explore the possibilities of creating radiatively stable entangled statesof two three-level dipole-interacting atoms in a $\Lambda$ configuration bymeans of laser biharmonic continuous driving or pulses. We propose threeschemes for generation of entangled states which involve only the lower statesof the $\Lambda$ system, not vulnerable to radiative decay. Two of them employcoherent dynamics to achieve entanglement in the system, whereas the third oneuses optical pumping, i.e., an essentially incoherent process.Comment: Replaced with the final version; 14 pages, 6 figures; to appear in  Phys. Rev. A, vol. 61 (2000

Analysis of radiatively stable entanglement in a system of two dipole-interacting three-level atoms