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April 24: Ira Rothstein (Carnegie Mellon University)

Time: 2pm
Location: 2N36
 
TITLE: The re-emergance of spontaneously broken space-time symmetries without Goldstones or Inverse Higgs
 
ABSTRACT: In this talk I will discuss how broken space-time symmetries can emerge in the IRafter being spontaneously broken in the UV, even though there may be no Goldstonebosons. Given that there has been a large body of work on trying to get space-timesymmetry (e.g. Lorentz) to be emergent in the IR via an RG attractive basin, this may seemlike a very surprising and non-generic result. However, I will show that in the context ofFermi liquid theory it is quite natural, and even required to preserve Fermi liquid behavioras the existence of Goldstone bosons (in this case they would be non-derivative coupled) would lead to shortened life-times for quasi-particles. I will also consider the spontaneous breaking of Schrodingersymmetry whose emergence (with no dilaton) in the IR leads to very strong constraintson Fermi liquids at unitarity.

Date of event: 
Mon, 2017-04-24 (All day)