String Theory Seminars
Holographic Wilsonian flows and emergent fermions in extremal charged black holes
by Dr. Daniel Elander (TIFR)
Monday, October 10, 2011
from
to
(Asia/Kolkata)
at Colaba Campus ( A304 )
at Colaba Campus ( A304 )
Description |
Recently, a holographic description of field theories with a cutoff has been proposed by Heemskerk and Polchinski, leading to a holographic version of the Wilsonian renormalization group. In this talk, we will describe how to generalize these ideas to fermionic operators. We will then proceed to apply them to study RG flows in extremal charged black hole backgrounds. Such backgrounds have a dual field theory description, which for certain values of the parameters can have a Fermi surface. The dynamics near the Fermi surface was captured by Faulkner and Polchinski in an effective semi-holographic model, containing a strongly coupled sector and an additional fermion coupled to it. We will show how this effective model can be derived using the ideas of holographic Wilsonian renormalization group, and in particular how the additional fermion emerges in the low energy effective action. |