This Week @ the SCGP

Wednesday, 4-26-2017
Mini Course: Modern Fluid Mechanics: From viscous electronics in graphene to conformal invariance and anomalies in turbulence
Time: 11:00 AM - 12:30 PM
Location: SCGP 313
Description: Title: Scaling anomaly in turbulence: Burgers, passive scalar, Navier-Stokes
Physics Seminar: Zohar Komargodski
Time: 1:30 PM - 2:30 PM
Location: SCGP 313
Description: Title: Global Aspects of some Quantum Field Theories Abstract: We will discuss several strongly coupled Quantum Field Theories and their non-Perturbative dynamics. We will cover some examples in Quantum Mechanics, Abelian Higgs models in 1+1 and 2+1 dimensions, and Yang-Mills theory in 3+1 dimensions. We will also make a brief comment about Yang-Mills theory in 4+1 dimensions. In all of these examples we exhibit new global anomalies that arise upon coupling these systems to background gauge fields. These gauge fields are often discrete and the anomalies are always due to large background gauge transformations. These anomalies can be encoded in terms of some topological invariants in one dimension higher. We use these observations to make predictions about the vacuum structure, about the degrees of freedom that are confined to domain walls, about the finite temperature behaviour of these theories, and about the possible enhanced symmetries in the infrared.
YITP Event: Joint pheno seminar @ YITP, John Donoghue
Time: 3:30 PM - 4:30 PM
Description: "A possible pathway beyond the gravitational effective field theory" Abstract: I will briefly review some of the obstacles to extending the quantum field theory treatment of General Relativity to all energies. Then I describe some recent work which has the goal of circumventing those obstacles and possibly heading towards a conventional quantum field theory for the UV completion of General Relativity.
Thursday - April 27, 2017
Math Event: Math Colloquium: Soren Galatius - Smooth manifold bundles
Time: 4:00 PM - 5:00 PM
Location: Math Tower P-131
Description: Title: Smooth manifold bundles
Speaker: Soren Galatius [Stony Brook]

Abstract: I will define the "moduli space of manifolds" and discuss joint work with Oscar Randal-Williams on understanding its homotopy theory, developed over the last five years. I will then explain a recent application to Pontryagin classes of topological bundles, due to Michael Weiss.
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Monday, 5-1-2017
Mathematics of topological phases of matter: May 1- June 23, 2017
Time: 12:00 AM - 12:00 AM
Location: SCGP 313
Description: For more information please visit our website:
Tuesday, 5-2-2017
SCGP Weekly Talk: Viatcheslav Kharlamov
Time: 1:00 PM - 2:00 PM
Location: SCGP 102
Description: Title: Deformation classification of real non-singular cubic 3-folds with marked real line. Abstract: Over the complex field such a classification is well known: all the pairs (non-singular cubic 3-fold, a marked line) are deformation equivalent. As often, over the real field the picture is more diverse. Already non-singular cubic 3-folds themselves form 9 deformation classes. To give the answer to the problem with lines involved, we will discuss a natural correspondence between real cubic 3-folds and real plane quintics. The lines on a non-singular cubic 3-fold form a non-singular surface, called the Fano surface of the cubic. The classification of pairs (cubic 3-fold, marked line) is based on the study of the monodromy action on the set of real components of Fano surfaces. Here, we will use old results by B.~Segre on monodromy of real lines on real cubic surfaces. Hashtag: #weeklytalk
Topology and Symplectic Geometry Seminar: Francisco Torres de Lizaur
Time: 2:30 PM - 3:30 PM
Location: SCGP 313
Description: Title: Emergence of topological structures in high-energy eigenfunctions of Dirac operators Abstract: We will introduce some techniques to address the following question: what type of topological structures emerge in the nodal sets of eigenfunctions of elliptic operators on compact manifolds? To illustrate these ideas, we will show that, for an infinite number of eigenfunctions of the Dirac operator on the round 3-sphere and the flat 3-torus, any knot and link type arises as nodal set of the spinor components. These structures appear at small scales and sufficiently high energies.