I will describe constructions of lattice field theories that assign a single bosonic variable to each site, rather a conjugate pair x,p. The information to realize a non-trivial dynamics is realized by non-trivial Poisson brackets between nearest neighbors. The construction is similar to staggered fermions in 1+1…

I will summarize recent results on the large N limit of path integrals of 3d SCFTs arising on the worldvolume of N M2-branes placed on compact Euclidean manifolds. The leading N^3/2 term in the large N expansion of these "free energies" receives 1/N, log(N), as well as exponentially suppressed corrections that can be…

** **The Miura transformation is a powerful formalism to construct generators of vertex operator algebras in free field representation. In this talk, I will explain that Miura operators are R-matrices of a certain quantum algebra, and comment on physical implications. I will also describe how to…

I will introduce two new families of critical string theories in two dimensions and explain that, when viewed as two-dimensional quantum gravity on the worldsheet, each is equivalent to a matrix model. The first worldsheet string theory consists of Liouville CFT coupled to timelike Liouville CFT. Its dual double-scaled…

In this talk, I will review a simple derivation of an integral kernel formula for the partition function of T Tbar deformed CFT based on the holographic single trace T Tbar deformation and its generalization to J Tbar and J Jbar deformations. I will then describe the application of this formalism to…

Holographic tensor networks model AdS/CFT, but so far they have been limited by involving only systems that are very different from gravity. Unfortunately, we cannot straightforwardly discretize gravity to incorporate it, because that would break diffeomorphism invariance. In this talk I will present a resolution,…

I will describe the one-loop partition function for strings propagating on AdS3 geometries with NS-NS flux (for generic values of AdS radius in string units). The essential ingredients that go into this analysis have been known for a while. The goal will be to organize the result to facilitate comparison to…

For backgrounds with known exact worldsheet theory descriptions, ordinary string perturbation theory can be employed to study observables such as spectrum and scattering. However, the majority of interesting string backgrounds, including AdS and flux compactifications, lack such descriptions, posing challenges in…

I will describe a double scaled matrix and tensor integral whose Feynman diagrams can be organized in a 3d topological expansion which agrees term by term with partition functions of 3d gravity. The integral is taken over CFT2 data, and the limiting potential imposes bootstrap constraints. The conjecture that the…

The TTbar deformation is a holographic theory describing holography a finite distance in the bulk. If this theory can be UV completed, it could be a model of nonperturbative bulk quantum gravity. However, it seems to be a non-unitary theory, as the energy eigenvalues lie either on the real axis or the…

We will discuss excitations with large spin and/or large particle number. For conformal theories this corresponds to investigating particular trajectories of heavy operators.

We find trajectories with large approximate degeneracy and show that they can be understood as coherent rotating fluids with…

The Schwinger model of two-dimensional quantum electrodynamics is among the oldest and best-studied quantum field theories, and is attracting renewed interest in connection with simulations of quantum lattice Hamiltonians. I will discuss an improved lattice formulation of the model, and show how it drastically…

I will give a lightning review of results on this subject from 1988-1998 and then describe more recent developments, mostly current work in progress. First, I will describe topological twisting of Lagrangian N=2 d=4 field theories in terms of the general concept of reduction of structure group. Second, I will…

Conformal Field Theory (CFT) represents a class of quantum field theories that has profound applications across various physics domains, from critical phenomena in statistical mechanics to quantum matter, quantum gravity, and string theory. In this talk, I will introduce our recently proposed 'fuzzy (non-commutative)…

I will discuss log corrections to the gravitational path integral around asymptotically Euclidean AdS4 backgrounds that arise from the compactification of string/M-theory. The heat kernel method will be utilized, which divides the log correction into local and non-local contributions. The local contribution is…

String stars, or Horowitz-Polchinski solutions, are string theory saddles with normalizable condensates of thermal-winding strings. In the past, string stars were offered as a possible description of stringy (Euclidean) black holes in asymptotically flat spacetime, close to the Hagedorn temperature. I will discuss the…

Khuri, in 1995, considered potential scattering for a model where one spatial coordinate in compactified on the circle. He adopted Greens function method to study analyticity property of scattering amplitude. His conclusion was that forward scattering amplitude does not satisfy dispersion relations in certain cases;…

We will review some recent work with M. Beccaria and S. Giombi

on checking AdS/CFT duality by reproducing certain supersymmetric localization results

in 3d superconformal Chern-Simons-matter (ABJM) theory by semiclassical

quantization of  …

Progress in recent years on the S-matrix bootstrap and bottom-up constructions of candidate string theory amplitudes, have brought about a revival of interest in the so-called Coon amplitude: a q-deformed generalization of the Veneziano amplitude exhibiting a semi-infinite sequence of poles that converge on an accumulation point, from which a…

I will talk about the invariants of topologically ordered states of quantum lattice systems that generalize Berry classes and can be defined for any gapped state in any dimension. The equivariant version of such invariants unifies and generalizes the Hall conductance and the Thouless pump. I will also discuss the…

## By Year

## By Category

- Astroparticle Seminar
- Atomic Physics Seminar
- Biophysics Seminar
- Condensed Matter Seminar
- Dark Cosmo Seminar
- Distinguished Lecture Series
- Donald R. Hamilton Colloquium
- Donald R. Hamilton Lecture
- Equity Diversity and Inclusion Initiative
- FPO
- Gravity Group Seminar
- Gravity Initiative Seminar
- High Energy Experiment Seminar
- High Energy Theory Seminar
- Mathematical Physics Seminar
- Particle Physics Seminar
- PCTS Seminar
- Phenomenology Seminar
- Princeton Quantum Colloquium
- Quantum Initiative
- Special Event
- Special Seminar
- Statistical Mechanics Seminar