en تخصصي Special پژوهشي Research In this paper, we study the entanglement of two-level atoms near a spherical silver nanoparticle. By employing the Von Neumann equation and utilizing of the electromagnetic Green&rsquo;s tensor associated with a dispersive and dissipative dielectric sphere, the decay rates and the Lamb shift of the atomic system are obtained. Then, by using the concurrence measure, we calculate the degree of entanglement of the atomic system. We observe that the decay rates severely increase near the excitation frequency of the localized plasmon-polariton, while the concurrence value is nearly zero.<br> &nbsp;<br> &nbsp; Decay rates, Localized surface plasmon-polariton, Entanglement, Concurrence. 99 106 http://ijop.ir/browse.php?a_code=A-10-672-1&slc_lang=en&sid=1 Roya Mombeiny Godazhdar roya.m.g72@gmail.com 10031947532846003137 10031947532846003137 Yes Department of Physics, Faculty of Basic Sciences, Shahrekord University, Shahrekord, Iran Ehsan Amooghorban amoghorban@gmail.com 10031947532846003138 10031947532846003138 No Department of Physics, Faculty of Basic Sciences, Shahrekord University, Shahrekord, Iran, Photonics Research Group, Shahrekord University, Shahrekord, Iran, Nanotechnology Research Center, Shahrekord University, Shahrekord, Iran Ali Mahdifar ali.mahdifar@gmail.com 10031947532846003139 10031947532846003139 No Department of Physics, Faculty of Science, University of Isfahan, Hezar Jerib, Isfahan, Iran, Quantum Optics Group, Department of Physics, Faculty of Science, University of Isfahan, Hezar Jerib, Isfahan, Iran