caa a22 4500 445886625 CHVBK 20180317145601.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11128-010-0210-1 doi (NATIONALLICENCE)springer-10.1007/s11128-010-0210-1 Entanglement and purity loss for the system of two 2-level atoms in the presence of the Stark shift [Elektronische Daten] [Hosny Hessian, M. Hashem] In this paper, we have presented an analytic solution for two 2-level identical atoms interacting with a single-mode quantized radiation field, taking into account the level shifts produced by Stark shift. We assume that the two atoms are initially prepared in the exited state and the field in a coherent state. We investigate the purity loss of the system and bipartite partitions of the system. The effects of the Stark shift on the purity loss of the system and different bipartite partitions of the system (field-two atoms, atom-(field+atom)) through the tangles are considered. In particular, the effect of the Stark shift on the amount of entanglement between atoms and field is evaluated by the negativity. The Author(s), 2010 Hessian Hosny Faculty of Science, Assiut University, Assiut, Egypt aut Hashem M. Faculty of Science, Assiut University, Assiut, Egypt aut Quantum Information Processing Springer US; http://www.springer-ny.com 10/4(2011-08-01), 543-556 1570-0755 10:4<543 2011 10 11128 https://doi.org/10.1007/s11128-010-0210-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11128-010-0210-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hessian Hosny Faculty of Science, Assiut University, Assiut, Egypt aut NATIONALLICENCE 700 1- Hashem M. Faculty of Science, Assiut University, Assiut, Egypt aut NATIONALLICENCE 773 0- Quantum Information Processing Springer US; http://www.springer-ny.com 10/4(2011-08-01), 543-556 1570-0755 10:4<543 2011 10 11128 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer