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SUMMARY:Spin chains as data\, entanglement and logic buses - Prof Sougato 
 Bose (University College\, London)
DTSTART:20131104T153000Z
DTEND:20131104T170000Z
UID:TALK48133@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:In this talk\, we describe some uses of the nonequilibrium dyn
 amics of a spin chain in connecting remote registers for scalable quantum 
 information processing. We first present a brief motivation\, and a basic 
 scheme to illustrate the idea of quantum state transfer through a spin cha
 in. This is followed by an extremely short outline survey (by no means exh
 austive) of the progress to date including recently proposed methods which
  provides a high fidelity state transfer with minimal engineering\, encodi
 ng and control. Next we present a couple of protocols for using nonequilib
 rium dynamics induced by quenches for establishing entanglement between we
 ll separated spins – these use the natural entanglement in a canonical c
 ondensed matter system\, namely the Kondo system\, but convert it to a use
 ful form through the dynamics. Finally the possibility of usage of spin ch
 ains for quantum logic between remote registers is discussed along with a 
 specific application to atomic systems.
LOCATION:Rutherford building\, Seminar Room B
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