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SUMMARY:Unparticles and strongly correlated electron matter - Phillips\, P
 W (University of Illinois at Urbana-Champaign)
DTSTART:20130916T104500Z
DTEND:20130916T113000Z
UID:TALK47134@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Co-authors: Bandon Langley (University of Illinois)\, Jimmy Hu
 tasoit (Pennsylvania State University)\n\nOne of the open problems in stro
 ng correlation physics is whether or not Luttinger's theorem works for dop
 ed Mott insulators. I will begin this talk by using this theorem to count 
 particles and show that it fails in general for the Mott state. The failur
 e stems from the divergent self energy that underlies Mottness. When such 
 a divergence is present\, charged degrees of freedom are present that have
  no particle interpretation. I will argue that such excitations are govern
 ed by a non-trivial IR fixed point and the propagator of which is of the u
 nparticle form proposed by Georgi. I will show how a gravity dual can be u
 sed to determine the scaling dimension of the unparticle propagator. I wil
 l close by elucidating a possible superconducting instability of unparticl
 es and demonstrate that unparticle stuff is likely to display fractional s
 tatistics in the dimensionalities of interest for strongly correlated elec
 tron matter.\n
LOCATION:Seminar Room 1\, Newton Institute
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