The University of Queensland
 
 
Centre for Mathematical Physics
 
SEMINAR
 
 
Speaker:  John Paul Barjaktarevic, Physics, UQ
 
Title:  Measurement-based teleportation along quantum spin chains
 
 10am, Wednesday 5th October, 2005
 
  Priestley Blding, room 641
 
 
Abstract:
 
The job of calculating the entanglement content in a quantum many body system 
is not very easy!  Instead, we look at another property which is

intimatelyrelated to entanglement - the ability to do teleportation. We

derive a simple condition under which a spin-1/2 chain is able to be used

to perform unit fidelity teleportation.  We find that ground states of

many model Hamiltonians are suitable for our teleportation protocol.  We

consider some applications to finite temperatures, 2D lattices and higher

spin systems.  We briefly suggest a way in which we can embed a virtual

spin-1/2 chains in physical spin-1 chains to greatly simplify the

protocol.  We find that all of our results are underpinned by a highly non-local 
order parameter.
 
All interested are invited to attend.
 

Enquiries to Katrina Hibberd email: keh@maths.uq.edu.au