Title: The Quark-Gluon Plasma in the AdS/CFT Correspondence and Thermal Perturbative QCD
Abstract: In this defense, I present my research on various aspects of the quark-gluon plasma (QGP) by using the AdS/CFT correspondence, and thermal perturbative QCD approaches. Among them, three topics are selected for in-depth discussion. The first and second topics will be on the effects of external magnetic field on the confinement-deconfinement phase transition, and thermalization of the QGP. The third topic will focus on various aspects of N = 4 super Yang-Mills theory on the Coulomb branch (cSYM) and its string theory dual. After showing that N = 4 cSYM has most of the properties expected from pure Yang-Mills theory at strong coupling, such as confinement (with Cornell potential), mass gap (with quantized mass spectrum), and thermodynamic pressure that vanishes at critical temperature Tc, we will discuss the hydrodynamic transport coefficients, and hard probe parameters (such as drag coefficient and jet quenching parameter) of N = 4 cSYM plasma. In addition, a new holographic mechanism for hadronization or particle production from the QGP will be proposed, and shown to be equivalent to the well-known Cooper-Frye formula in the hydrodynamic or low frequency limit. Finally, other results from my Ph.D. research will be briefly reviewed.
Kiminad Mamo Defense Poster