# 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

Tue, Oct 22, 2019, 4:30 pm

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

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

Tue, Oct 22, 2019, 4:00 pm

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.

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### 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"

Tue, Oct 22, 2019, 2:00 pm

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

Mon, Oct 21, 2019, 2:30 pm

Audience: A free lecture open to the public.
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### Biophysics Seminar: Aleksandra Walczak, École Normale Supérieure de Paris: Response in immune repertories|Joseph Henry Room

Mon, Oct 21, 2019, 12:00 pm

Response in immune repertories

Audience: A free lecture open to the public.
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### High Energy Theory | Sabrina Gonzalez Pasterski - Princeton | "4D Scattering as 2D Correlators"

Fri, Oct 18, 2019, 1:45 pm

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.

Audience: A free lecture open to the public.
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### Atomic Physics Seminar | Daniel Thrasher. U of Wis., Madison | "Comagnetometry with transversely polarized 129Xe and 131Xe" | Jadwin 233

Fri, Oct 18, 2019, 12:00 pm

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.

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

Wed, Oct 16, 2019, 1:45 pm

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.

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

Tue, Oct 15, 2019, 4:30 pm

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.

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

Tue, Oct 15, 2019, 4:00 pm

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...

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

Mon, Oct 14, 2019, 2:30 pm

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.

Audience: A free lecture open to the public.
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### Gravity Initiative Lunch, Eliot Hijano | PGI "S-matrix in flat space from AdS/CFT"

Mon, Oct 14, 2019, 12:30 pm

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

Mon, Oct 14, 2019, 12:00 pm

Mechanics, geometry and topology of cell nuclei and metaphase chromosomes

Audience: A free lecture open to the public.
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### High Energy Theory - "dS thermodynamics from bulk and horizon characters" Zimo Sun - Columbia

Fri, Oct 11, 2019, 1:45 pm

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...

Audience: A free lecture open to the public.
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### Gravity Group Lunch Seminar, Maria Salatino | Stanford University & KIPAC "Cosmology from the Tibetan Plateau: the AliCPT-1 Telescope"

Fri, Oct 11, 2019, 12:00 pm

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"

Thu, Oct 10, 2019, 8:00 pm
Audience: A free lecture open to the public.
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### Physics Group Meeting @ IAS | Daniel Kapec, IAS | “Black Hole Images and the Photon Ring” | Bloomberg Hall Physics Library

Wed, Oct 9, 2019, 1:45 pm

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.

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