Events - Daily
November 27, 2012 >>
|Tuesday, November 27|
High Energy Theory Seminar - Tigran Kalaydzhyan - DESY & ITEP - "Holography and chiral superfluidity for the quark-gluon plasma"
I would like to present our recent progress in understanding the local parity violating effects in QCD, and particularly in the strongly coupled quark-gluon plasma (sQGP).
First, I will describe a fluid-gravity (holographic) approach, predicting the strength of the chiral magnetic and vortical effects
(CME/CVE) and their dependence on the elliptic flow of the QGP, as well as on thermodynamic variables. For this purpose we build a gravity dual of an anisotropic fluid with multiple U(1) charges in presence of external vector fields and the chiral anomaly. The elliptic flow dependence allows us to separate P-/CP-odd effects from a purely hydrodynamic background in heavy-ion collisions.
Second, I will focus on a novel "chiral superfluid" effective theory of QCD in the deconfinement phase. The main idea of the model is the presence of a light axion-like dynamic degree of freedom within QCD, which one can obtain by a 4D bosonization of the near-zero fermionic
(Dirac) modes. This new axion-like field accommodates the essential chiral properties of QGP and, together with thermalized quarks and gluons, forms a two-component fluid. The latter turns out to be an unconventional (chiral) superfluid, which, being polarized in electromagnetic fields, gives rise to CME and other potentially measurable physical phenomena. I will also comment on topological defects populating the QCD vacuum as a physical origin of the superfluidity.
PCTS Seminar Room · 1:30 p.m.– 2:30 p.m.