RT - Journal Article T1 - Creation of long-distance entanglement between two entangled spin ½ particles in external magnetic fields JF - opsi YR - 2014 JO - opsi VO - 20 IS - 0 UR - http://opsi.ir/article-1-263-en.html SP - 1301 EP - 1305 K1 - Entanglement K1 - concurrence K1 - qubit AB - We study the variation of entanglement with distance for a two spin-1/2 system with Dzyaloshinskii-Moriya (DM) interaction, while one of the spins is driven by a time-varing rotating magnetic field and the other one is coupled with a static magnetic field. We show that when we consider the spin-spin coupling coefficient in the form of the Calogero-Moser types, the entanglement can increase with the distance and reach a peak then it decreases for a short distance and will be unchanged for very long distances. So, it is possible to create a significant amount of entanglement between distant qubits, simultaneously avoiding direct interactions between them and single-subsystem addressing. LA eng UL http://opsi.ir/article-1-263-en.html M3 ER -