PLEASE NOTE THIS TALK FROM 10/8 HAS BEEN RESCHEDLED TO 10/22/2019 -- THANK YOU!

# Events Archive

## 2019

### Math Physics Seminar | Michael Aizenman, Princeton | ``Geometric analysis of frustration in a class of SU(2S+1) invariant quantum spin chains’’ | Jadwin A06

### Pheno & Vino Seminar | Marat Freytsis, Rutgers | "Functional methods and universal one-loop matching in HQET and beyond" | Jadwin 303

Functional methods, in particular efficient reorganization of the one-loop effective action, have recently made a reappearance in simplifying the problem of computing matching and running effects in Lorentz-invariant effective field theories (EFTs) such as the Standard Model Effective Field Theory.

### HEP Seminar -Pallabi Das-TIFR- "Measurement of top-Higgs Yukawa coupling in tH process with 13 TeV data collected by CMS experiment at the LHC"

The current mandate of the LHC experiments is to precisely determine the properties of the Higgs boson, one of the major interests being the top-Yukawa coupling measurement. The Run 2 data has provided evidence of ttH production at the LHC which is sensitive to the magnitude of the coupling at tree level.

### HET Seminar | Bruno Balthazar, Harvard | "ZZ Instantons and the Non-Perturbative Dual of c=1 String Theory" | Jadwin A07

### Gravity Initiative Lunch, Will Cook | PGI “High Energy Collisions of Black Holes in Higher Dimensions”

### Biophysics Seminar: Aleksandra Walczak, École Normale Supérieure de Paris: Response in immune repertories|Joseph Henry Room

Response in immune repertories

### High Energy Theory | Sabrina Gonzalez Pasterski - Princeton | "4D Scattering as 2D Correlators"

The asymptotic symmetry algebra of asymptotically flat spacetimes implies an infinity of conserved charges for 4D scattering which can be neatly recast as 2D conformal Ward identities.

### Atomic Physics Seminar | Daniel Thrasher. U of Wis., Madison | "Comagnetometry with transversely polarized 129Xe and 131Xe" | Jadwin 233

Spin-exchange pumped noble gas comagnetometers consist of two or more co-located ensembles of noble gas atoms whose nuclei are polarized by spin-exchange collisions with polarized alkali atoms. Such devices been used to place upper bounds on fifth forces and Lorentz violations and for the measurement of inertial rotation.

### Joint Gravity Group / Pheno & Vino Seminar, Adam Riess | JHU & STScI “The Expansion of the Universe, Faster than We Thought”

**Abstract****:**

### Physics Group Meeting at IAS | Baurzhan Mukhametzhanov, IAS | “Matrix Models and Minimal Liouville Gravity” | Bloomberg Lecture Hall

I will review some old ideas about the duality between matrix models and Liouville theory coupled to a (p,q) minimal model. In this approach t'Hooft diagrams of the matrix model are thought of as a discretization of a 2d surface. Fine-tuning of the coupling constant leads to divergence of the perturbative expansion.

### Math Physics Seminar | Rodrigo Matos, Michigan State | "Localization in the Disordered Hubbard Model within Hartree-Fock Theory" | Jadwin A06

We aim at presenting a simple context where known results on Anderson localization for systems of non-interacting particles in a random environment may be extended to systems with weak interactions.

### Pheno & Vino Seminar | Malte Buschmann, U of Michigan | "Early-Universe Simulations of the Cosmological Axion" | Jadwin 303

We perform high resolution simulations in a scenario where the Peccei-Quinn (PQ) symmetry is broken after inflation starting at the epoch before the PQ phase transition and ending at matter-radiation equality. We characterize the spectrum of primordial perturbations that are generated and comment on implications for efforts to detect axion dark...

### HEP Seminar-Luiz de Viveiros- Penn State University-"Project 8: Measuring the Neutrino Mass using Cyclotron Radiation Emission Spectroscopy"

### HET Seminar | Geoff Penington | Stanford University | “Entanglement Wedge Reconstruction and the Information Paradox” | Bloomberg Lecture Hall

When absorbing boundary conditions are used to evaporate a black hole in AdS/CFT, we show that there is a phase transition in the location of the quantum Ryu-Takayanagi surface, at precisely the Page time. The new RT surface lies slightly inside the event horizon, at an infalling time approximately one scrambling time in the past.

### Gravity Initiative Lunch, Eliot Hijano | PGI "S-matrix in flat space from AdS/CFT"

**Abstract:** It is currently not well understood whether the holographic principle can be applied to asymptotically flat space-times.

### Biophysics Seminar: John Marko, Mechanics, geometry and topology of cell nuclei and metaphase chromosomes|Joseph Henry Room

**Mechanics, geometry and topology of cell nuclei and metaphase chromosomes **

### High Energy Theory - "dS thermodynamics from bulk and horizon characters" Zimo Sun - Columbia

In this talk, I will discuss the idea that the exact one-loop free energy of the static patch of D-dimensional de Sitter space can be computed as a simple integral transform of an SO(1;D) bulk character corrected by an SO(1; D-2) edge character, for fields of arbitrary mass and spin. The bulk character captures the particle content of the...

### Gravity Group Lunch Seminar, Maria Salatino | Stanford University & KIPAC "Cosmology from the Tibetan Plateau: the AliCPT-1 Telescope"

**Abstract**: AliCPT-1 will be the first telescope observing the CMB at high altitude (5,200 m a.s.l.) from the northern hemisphere. In this talk, I will give an overview of the experiment and its science goal. I will present the design of the cryostat receiver, underlining how the instrument design meets the expected performance...

### Public Lecture-PCTS Annual Lecturer, Aleksandra Walczak,"The Evolution within Us: Statistics of Immunity"

### Physics Group Meeting @ IAS | Daniel Kapec, IAS | “Black Hole Images and the Photon Ring” | Bloomberg Hall Physics Library

The EHT Collaboration has recently published images of the supermassive black hole in M87. The images are dominated by a bright ring-like structure with an angular brightness asymmetry. While the diameter of this ring is resolved by the EHT, its thickness and detailed substructure are not.