MS Seminar (Mathematics - String Theory)

Speaker: Andreas Karch (U. Washington)
Title: Scaling laws for thermo-electric transport at quantum criticality
Date: Tue, Jun 30, 2015, 13:15 - 14:45
Place: Seminar Room A
Related File: 1482.pdf
Abstract: Transport properties at quantum critical points are strongly constrained by dimensional analysis. They are typically governed by two critical exponents: the dynamical critical exponent z determining the relative scaling of spatial and temporal coordinates and the hyperscaling violating exponent theta. We will show that in general response to electromagnetic fields requires a third exponent, an anomalous dimension for the coupling to background fields. We show that this exponent is generically non-zero in critical points constructed via holography and discuss its potential relevance to the physics of cuprates.