Holographic quark gluon plasma with flavor

Abstract

In this work I explore theoretical and phenomenological implications of chemical potentials and charge densities inside a strongly coupled thermal plasma, using the gauge/gravity correspondence. Strong coupling effects discovered in this model theory are interpreted geometrically and may be taken as qualitative predictions for heavy ion collisions at RHIC and LHC. In particular I examine the thermodynamics, spectral functions, transport coefficients and the phase diagram of the strongly coupled plasma. For example stable mesons, which are the analogs of the QCD Rho-mesons, are found to survive beyond the deconfinement transition. This paper is based on partly unpublished work performed in the context of my PhD thesis. New results and ideas extending significantly beyond those published until now are stressed.

Sum rules from an extra dimension

“…The current-current correlation function for the holographic superconductor with a charged scalar at the Breitenlohner-Freedman bound is in this class [29]. Such modes were also observed in the low temperature limit of current-current correlation functions for the D3/D7 system, at nonzero charge densities [22,30,31,32].…”

From Maxwell-Chern-Simons theory in AdS 3 towards hydrodynamics in 1 + 1 dimensions

“…One possibility to couple the fluctuations to a non-conformal background would be to find a backreacted non-conformal background solution analytically. A second possibility would be to turn the Abelian gauge field into a non-Abelian gauge field and turning on one or more chemical potentials, see [76][77][78], and in particular [79] and corrections/extensions given in [80]. In the case of a non-Abelian gauge field, even on the probe level, the linearized fluctuation equations would contain the probe background fields because of the terms in the action which are now cubic and quartic in the gauge field.…”

Flavor Superconductivity and Superfluidity

“…The setup of intersecting D-branes and especially the particular D3-D7 construction presented here is interesting because of its diverse applications. It has been successfully used to model strongly coupled particle physics phenomena such as a deconfinement, or rather meson melting phase transition for fundamental matter and transport coefficients in the quark gluon plasma experimentally created at the RHIC collider in Brookhaven (see [4] for an introductory review and further references). On the other hand it has recently been used to model strongly correlated electron systems as they appear in superfluids and superconductors in the realm of condensed matter physics [5,6].…”