Physics

In my talk I will explicitly describe what topological termspreserving time-reversal symmetry one can introduce in 3+1d Yang-Mills theory. Classification of such terms corresponds to classification of SPTs via cobordisms proposed by Kapustin and...

In this talk I review new results obtained for SCFT's in 4 and 5 dimensions by compactifying 6 dimensional (1,0) SCFT's on a circle or on Riemann surfaces.

The multiscale entanglement renormalization ansatz (MERA) is a tensor network that can efficiently approximate ground states of critical spin chains --that is, lattice versions of 1+1 CFTs. Its network structure extends in an additional dimension...

Recent lattice results on $\theta$ at high temperatures call into question the standard semiclassical analysis of $\theta$-dependence at high temperatures. We examine arguments that there are large uncertainties in these computations, studying both...

Global symmetries in two dimensions are implemented by topological defect lines (TDLs). For continuous global symmetries, the TDLs are nothing but the Noether charges. However, there are TDLs that are not associated to any global symmetry, and can...

The Institute will open at 10am on Thursday, March 8th.

In finite entropy systems such as black holes, real-time partition functions do not decay to zero at late times. It is a challenge to derive this non-decaying behavior starting from the path integral over the master fields of a large N theory. I...

Noether's theorem is textbook material in quantum field theory, but among experts it has been known for a while that there are quantum field theories with continuous global symmetries which possess no conserved current. In this talk I will give a...