Physics

Abstract: 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...

Abstract: Based on a recent paper with Juan and Yue-Zhou (https://arxiv.org/pdf/2409.14218). In this talk I will first review the no-boundary wavefunction in the context of inflation, and explain its natural generalization to the density matrix of a...

Abstract: A key challenge for computation is solving problems in high dimensions. Two classic proposals for tackling high dimensional problems are the Bethe approximation, or "belief propagation", and the quantum Fourier transform. Tensor networks...

Abstract: I will naively analyze the Regge trajectory of the leading-twist operators in the critical O(N) model to leading order in 1/N. The anomalous dimensions of these operators develop simple poles in the spin J, preventing one from naively...

Abstract: Non-invertible categorical symmetries have emerged as a powerful tool to uncover new beyond-Landau quantum phases and phase transitions. The general theory of such phases and transitions has been studied systematically primarily in (1+1)d...

Abstract: In the AdS/CFT correspondence, it is of great importance to understand the emergence of bulk geometry from quantum mechanical degrees of freedom on the boundary. Volumes of spatial subregions are key quantities characterizing the bulk...

Abstract: I will present a general Monte Carlo approach to the calculation of Feynman diagrams relevant to perturbative problems in collider physics, hot and dense QCD, non-relativistic many-body systems and classical physics.