Physics Colloquium

University of Illinois

Are high-temperature superconductors full of Unparticles?

I will begin this colloquium by using the standard procedure in condensed matter to count particles. For strongly correlated models relevant to high-temperature superconductors, I will show that this procedure cannot account for all the charged degrees of freedom. The charged stuff which is left out cannot be given an interpretation in terms of particles. I will argue that the unparticle construction of Howard Georgi's makes up the difference. I will show how a gravity dual can be used to determine the scaling dimension for unparticles.

I will close by elucidating a possible superconducting instability of unparticles and demonstrate that unparticle stuff is likely to display fractional statistics in the dimensionalities of interest for strongly correlated electron matter.

Monday, 27 January, 2014


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