Based on https://arxiv.org/abs/2408.11139 . In this talk we'll explain how self-dual metrics (which correspond to spacetimes containing only positive helicity gravitons) can be written as a sum over connected "tree" diagrams, which are different...

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Physics Group Meeting

We revisit the lattice formulation of the Schwinger model using
the Kogut-Susskind Hamiltonian approach with staggered fermions.
This model, introduced by Banks et al., contains the mass
term *m*lat ∑*n* (−1)*n*
*χ*†*nχn*, and setting it to zero is often...

In this talk I will discuss aspects of decoupling fields that appear in the engineering of 4d SCFTs from compactifications of 6d (1,0) SCFTs of A_(N-1) type. By studying various ways of constructing the anomaly polynomial for the 4d theory, it is...

I will discuss partition functions in three-dimensional quantum gravity with negative cosmological constant in canonical quantization. I will review the phase space and its quantization in detail, which leads to the computation of the gravity...

We will discuss the price of the quantum error correcting codes, defined as the number of physical qubits needed to reconstruct whether a given operator has been acted upon the thermal state or not. By thinking about reconstruction via quantum...

In the 1980's, Atiyah introduced a mathematical definition of the notion of a topological quantum field theory. In this talk, I'll recall Atiyah's definition and explain the motivation for the more elaborate notion of an extended topological field...

Quantum extremal surfaces and islands have led us to rethink the very meaning of microscopic entropy in the presence of dynamical gravity. I will present some work elucidating how the island/QES prescription emerges in a simple doubly holographic...

In the first of two lectures I will present a pedagogical exploration of perhaps the simplest random matrix model, the Gaussian Unitary Ensemble. It gives the Airy model in the double scaling limit. I will first review the features that we usually...

We present constraints on non-local primordial non-Gaussianity (NLPNG) from the Baryon Oscillation Spectroscopic Survey data. We first review how NLPNG arises in single-field inflationary models. We then review the Effective Field Theory of Large...