Dzyaloshinskii-Moriya interaction as an agent to free the bound entangled states

摘要

In the present article we investigate the efficacy of Dzyaloshisnhkii-Moriya(DM) interaction to convert the bound entangled states into free entangledstates. Here we consider the tripartite hybrid system as a pair of noninteracting two qutrits initially prepared in bound entangled states and oneauxiliary qubit. The auxiliary qubit interacts with any one of the qutrit ofthe pair through DM interaction. It has been found that the DM interaction freethe bound entangled states as time advances. In the present work we considertwo types of bound entangled states investigated by Horodecki. Further we findthat the frequency of free entanglement conversion is same in both the states.We also investigate the phenomenon of entanglement and distillability suddendeath and their possibilities. Here the realignment criteria and negativityhave been used for detection and quantification of entanglement.