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SUMMARY:Physical interpretation of the Wigner rotations and its implicatio
 ns to relativistic quantum information - Pablo Saldanha (University of Oxf
 ord)
DTSTART:20110505T131500Z
DTEND:20110505T141500Z
UID:TALK29873@talks.cam.ac.uk
CONTACT:Ashley Montanaro
DESCRIPTION:We present a new treatment for the spin of relativistic partic
 les in the context of quantum information based on a physical interpretati
 on of the Wigner rotations\, which specify the change of the spin state of
  a particle with a change of reference frame\, obtaining different results
  in relation to the previous works. We are lead to the conclusion that som
 e assumptions made by most of the previous papers on the subject\, namely 
 the possibility of a momentum-spin separation of the system and the use of
  the Pauli-Lubanski (or similar) spin operators to describe spin measureme
 nts\, are not consistent. We also propose an experimental test of our form
 ulation and discuss its implications for the violation of Bell's inequalit
 ies with relativistic particles.
LOCATION:MR4\, Centre for Mathematical Sciences
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