Theory HEP Seminar

On the Physics and Differential Geometry of Top-Down Holographic QCD at Intermediate Coupling

Aalok Misra

IIT, Roorkee

Building up on the type IIB dual of large-N QCD-like theories as constructed by the McGill Strings-QCD group(s), inclusive of quartic-in-curvature (R⁴) corrections in the context of M-theory uplift at intermediate coupling, on the Physics side we will (i) discuss whether the high-temperature dual is chaotic, (ii) show that we obtain a lattice-compatible bulk-to-shear-viscosity ratio that interpolates between the weak and strong coupling results, (iii) discuss a non-renormalizable (up to O(R⁴)) M-chiral perturbation theory-compatible deconfinement temperature compatible with an appropriate entanglement entropy computation, (iv) discuss how one obtains a “Page curve” for the entanglement entropy corresponding to the relevant eternal neutral black hole with a “Swiss-cheese” structure, (v) discuss obtaining QCD-compatible inert supermassive mesinos (thereby resolving a longstanding problem with the Sakai-Sugimoto model), and (vi) discuss “Flavor Memory” effect common to (i) - (v). On the Math side, we will discuss (i) SU(3)/SU(4)/G₂/Spin(7)-torsion classes of the underlying six-, seven- and eight-folds appearing in the string/Structures (AC3MS) along with Contact 3-Structures induced by the G₂ structure on a closed seven-fold M₇ relevant to the M-theory dual, and three-tuples of SU(3) structures along the “transverse” six-fold induced by the AC(3)MS, (iii) will show that the N >> 1 Almost Contact Metric 3-Structures arising from the G₂ structure, do not connect to Contact 3-Structures (in the IR) which are shown to exist only for an appropriate intermediate N >1-limit, and (iv) discuss connection with (the aforementioned) Physics (results).