caa a22 4500 445886617 CHVBK 20180317145601.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11128-010-0214-x doi (NATIONALLICENCE)springer-10.1007/s11128-010-0214-x Ghojavand Majid Physics Department, Sharif University of Technology, P.O. Box 11365-9161, Tehran, Iran aut A low complexity scheme for entanglement distributor buses [Elektronische Daten] [Majid Ghojavand] For technological purposes and theoretical curiosity, it is very interesting to have a building block that produces a considerable amount of entanglement between on-demand sites through a simple control of a few sites. Here, we consider permanently-coupled spin networks and study entanglement generation between qubit pairs to find low-complexity structures capable of generating considerable entanglement between various qubit pairs. We find that in axially symmetric networks the generated entanglement between some qubit pairs is rather larger than generic networks. We show that in uniformly-coupled spin rings each pair can be considerably entangled through controlling suitable vertices. To set the location of controlling-vertices, we observe that the symmetry has to be broken for a definite time. To achieve this, a magnetic flux can be applied to break symmetry via Aharonov-Bohm effect. Such a set up can serve as an efficient entanglement distributor bus in which each vertex-pair can be efficiently entangled through exciting only one fixed vertex and controlling the evolution time. The low-complexity of this scheme makes it attractive for use in nanoscale quantum information processors. Springer Science+Business Media, LLC, 2010 Entanglement provision nationallicence Low complexity nationallicence Entanglement distributor bus nationallicence Axially symmetric graph nationallicence Quantum Information Processing Springer US; http://www.springer-ny.com 10/4(2011-08-01), 519-532 1570-0755 10:4<519 2011 10 11128 https://doi.org/10.1007/s11128-010-0214-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11128-010-0214-x text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Ghojavand Majid Physics Department, Sharif University of Technology, P.O. Box 11365-9161, Tehran, Iran aut NATIONALLICENCE 773 0- Quantum Information Processing Springer US; http://www.springer-ny.com 10/4(2011-08-01), 519-532 1570-0755 10:4<519 2011 10 11128 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer