We show how kSZ tomography measures a bispectrum containing a cosmological power spectrum of the velocity field and an astrophysical power spectrum of the electron density.

# Events Archive

## 2018

### Gravity Group Lunch Seminar, Mathew Madhavacheril (Princeton) "kSZ cosmology without the optical depth degeneracy"

### FPO - Vladimir Kirilin - "Higher spin operators in conformal field theories"

**Abstract**

### Hamilton Colloquium Series: Mariangela Lisanti, Princeton University, "Dark Matter in Disequilibrium" Jadwin A10

**The Gaia mission is in the process of mapping nearly 1% of the Milky Way’s stars. This data set is unprecedented and provides a unique view into the formation history of our Galaxy and its associated dark matter halo. I will review results based on the most recent Gaia data release, which demonstrate that the inner Galaxy is dominated...**

### Pheno & Vino Seminar | Cora Dvorkin, Harvard | "Novel Probes of Dark Matter" | Jadwin 303

In the first part of this talk, I will discuss how we can use observations of the Cosmic Microwave Background and the Large-Scale Structure of the universe to improve our understanding of an open question in fundamental physics: the particle nature of dark matter.

### HET Seminar | Vladimir Narovlansky, Weizmann Institute | "Exact correlation functions in double-scaled SYK" | PCTS Seminar Room

We show that exact results (at all energy scales) can be obtained in double-scaled SYK, which is the usual SYK model with the number of fermions in the interaction scaling as \sqrt{N}. These include the calculation of the full four-point function. The analysis does not involve summations of Feynman diagrams, but rather uses combinatorial tools...

### HET Seminar | Masataka Watanabe, University of Tokyo & Kavli IPMU | "The Large Charge Expansion and the Universal Correlation Functions in Rank-1 SCFT" | PCTS Seminar Room

The two-point functions <O^n(x) Obar^n(y)> for generator O of Coulomb branch chiral rings in D=4 N=2 SCFT will be determined universally to all orders in 1/n by the theory's a-anomaly.

### Condensed Matter Seminar | Assa Auerbach, Technion | “Hall number of strongly correlated metals”| PCTS Seminar Room 407

A convergent summation formula for the DC Hall number of strongly correlated and disordered metals is derived from the Kubo formula. Properties of Bogoliubov operator Hilbert space are used for the derivation [1].

### The Quantum Hall Effect: Applied Science's Gift to Fundamental Science

Abstract: In this talk, I will trace the interplay of science and technology in the context of semiconductor heterostructures and the quantum-hall effect (QHE), culminating in the discovery of the fractional QHE, and unfolding of its complex, hierarchical structure. Following that, I will give an overview of the fascinating phenomena that QHE...

### HET Seminar at IAS | Vladimir Rosenhaus, School of Natural Sciences, IAS | “d-dimensional SYK, AdS loops, and 6j Symbols”

### FPO - Debayan Mitra "Exploring Attractively Interacting Fermions in 2D Using a Quantum Gas Microscope"

Recent advances in the field of ultracold quantum gases have played an important role in expanding our understanding of strongly-correlated quantum matter. These gases are isolated, clean and fully controllable systems, allowing bottom-up engineering of idealized condensed matter models.

### Gravity Group Lunch Seminar: Hans Bantilan (QMUL), "Non-Spherically Symmetric Collapse in Asymptotically AdS Spacetimes"

The main purpose of this talk is to describe, by way of a concrete example, how the field of numerical relativity contributes to our understanding of asymptotically AdS spacetimes. I will begin by motivating these studies in terms of gauge/gravity duality, heavy ion physics, and gravitational collapse.

### Hamilton Colloquium Series: Waseem Bakr, Princeton University, "Quantum Gas Microscopy of Strongly Interacting Fermions in Optical Lattices" Jadwin A10

Ultracold fermions in optical lattices provide a clean physical realization of the celebrated Fermi-Hubbard model of condensed matter, a minimal model believed to contain the essential ingredients for high-temperature superconductivity.

### Physics Group Meeting at IAS | Petr Kravchuk, School of Natural Sciences, IAS | “Discussion on the OPE Inversion Formula and Related Topics”

Suggested reading:

[1]: review of Euclidean and original derivation of Lorentzian

inversion formula https://arxiv.org/abs/1703.00278

[2]: an alternative derivation https://arxiv.org/abs/1711.03816

### Math Physics Seminar | Michael Kiessling, Rutgers | "Do particles and anti-particles really annihilate each other?" | 343 Jadwin Hall

In this talk I present theoretical evidence, based on non-perturbative semi-classical quantization techniques, that what appears as the annihilation of Positronium (Ps) may in reality be just another electromagnetic transition from the hydrogenic pseudo-ground state of Ps to a true quantum-mechanical ground state near zero energy, caused by ...

### HET Seminar at IAS | Saso Grozdanov, MIT | “Higher-form Symmetries in Magnetohydrodynamics, Effective Field Theory and Holography”

### HET Seminar | Bernard Julia, LPT-ENS | "Exceptional families of symmetries" | PCTS Seminar Room

It is important to understand the origin of exceptional symmetries like E7 duality in 4d M-Sugra. Depending on the context and the defining property at work (anomaly or divergence cancellation, attractor mechanism, classification of supergauge theories in 4, 5 or 6d, 2d integrable systems...) the En groups appear in various families.

### Pheno & Vino Seminar | Johann Brehmer, NYU | "Learning to constrain new physics" | Jadwin 111

An important part of the LHC legacy will be precise limits on indirect effects of new physics, parameterized for instance in an Effective Field Theory (EFT). These measurements involve many parameters and observables and are often challenging for established analysis methods.

### Physics Group Meeting at IAS | Brian Swingle, School of Natural Sciences & University of Maryland | “Introduction to "Fractons" and the Haah Code”

Here are some references for Haah's code and the larger world of "fractons". This list is far from complete and does not accurately capture the history of the subject.

1. Haah's original work: https://arxiv.org/abs/1101.1962

### HET Seminar | David Kutasov, University of Chicago | "Solvable irrelevant deformations of CFT_2 and AdS_3" | PCTS Seminar Room

I will describe recent progress on the study of solvable irrelevant deformations of two dimensional conformal field theories, focusing on the torus partition sum of these theories. I will also discuss some related solvable irrelevant deformations of string theory on AdS_3.

### CMB Cosmology for Kids!

Come make speakers, play with polarizers, take cool thermal images, and learn why and how scientists take their telescopes to the edges of the world to the beginning of the universe!