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SUMMARY:Robust Engineering of Correlations and Symmetries on Quantum Netwo
 rks - Ticozzi\, F (Universit degli Studi di Padova)
DTSTART:20140805T104500Z
DTEND:20140805T112500Z
UID:TALK53609@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:In many quantum information applications\, ranging from comput
 ation to communication\, a key step is the ability to engineer some states
  with given correlations on multipartite systems (or "quantum network")\, 
 where the interaction betweens the parts are limited by locality constrain
 ts and control capabilities. We here focus on two specific tasks and some 
 robust\, randomized protocols to achieve them. The first one is the asympt
 otic preparation of a given entangled pure state: we provide a test to che
 ck if the task is feasible under the existing constraints\, as well as ran
 domized design methods for controlled open-system dynamics. The second is 
 the symmetrization of the network state with respect to the subsystem perm
 utation group: we show that this problem can be tackled with methods borro
 wed from classical "consensus" problems. Motivating examples and applicati
 ons will be introduced. In both cases\, asymptotic convergence to the targ
 et can be proved under mi nimal assumptions on the network topology and th
 e way the local dynamics are selected. \n
LOCATION:Seminar Room 1\, Newton Institute
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