In recent years we have witnessed the emergence of a novel description for the physics of scattering amplitudes at the heart of which are mathematical structures called Positive Geometries, which loosely speaking are generalizations of polytopes having the crucial feature of encoding in their boundaries the singularity structure of...
School of Natural Sciences, IAS
Scattering Amplitudes, Positive Geometries and Surfaces
Women are 51% of the population and, in Mao Zedong's timeless words, "hold up half the sky." In the context of astrophysics, science, and STEM, why are women
glaringly absent from studies of the sky, and what can we do as colleagues, researchers, and everyday allies to increase their representation and support their
Dr. Taharee A. Jackson
"Half the Sky: Gender Equity, Solidarity, and Support for Women in STEM"
The graph of interactions in a quantum many-body system is crucial for governing the flow of information and the structure of correlations. We engineer programmable nonlocal interactions in an array of atomic ensembles within an optical resonator, where photons convey information between distant atomic spins. In our system of spin-1 atoms,...
Magic angle twisted bilayer graphene (MATBG) has been shown to host a variety of correlated insulator states at integer fillings. These correlated insulator states are believed to arise from symmetry breaking within the flatband manifold arising from spin, valley, and band degrees of freedom.
After a century of biochemical and genetic onslaught on the embryo we are left with an inexhaustive parts list with an increasingly baroque logic. How do we begin to assemble complex living systems from knowledge of the parts list?
I will introduce the gravitational path integral and discuss some of its modern applications. Our first application will be to the black hole information paradox, where we will see that nontrivial gravitational saddles are important in exhibiting unitarity of black hole evaporation.
IAS HET Seminar | Salvatore Torquato, Princeton University; Member, School of Natural Sciences, IAS | "Hyperuniformity in Classical and Quantum States of Matter" | Wolfensohn Hall (behind Bloomberg Hall) & on Zoom
Abstract: Advances in optical neural imaging provide an opportunity to record panneuronal neural activity and behavior simultaneously. With a compact nervous system, the transparent nematode Caenorhabditis elegans is a good candidate for whole-brain imaging and investigating the neural representation of behaviors.
“The computational tools for whole-brain imaging and the neural dynamics of behaviors in C. elegans”
According to Gibbons and Hawking the entropy of a dS universe is encoded in the Euclidean gravitational path integral over compact manifolds with dominant sphere saddle. In this talk I will report on recent work in which we explicitly calculate this gravitational path integral in two spacetime dimensions.
The semiclassical gravitational path integral and random matrices
I will introduce a class of non-invertible topological defects in (3+1)d gauge theories whose fusion rules are the higher-dimensional analogs of those of the Kramers-Wannier defect in the (1+1)d critical Ising model.
Stony Brook University
Kramers-Wannier-like duality defects in (3+1)d gauge theories
We start by revisiting the task of constructing a holographic dual to quantum gravity in asymptotically flat spacetimes. Upon recasting the S-matrix in terms of data at the conformal boundary, we see that the two standard approaches amount to slicing up the bulk and boundary in different ways.