Events Archive

2018

Gravity Group Lunch Seminar, Rachael Beaton (Princeton) "An Update on an Alternate Route to the Hubble Constant via the Distance Ladder"

Fri, Oct 19, 2018, 12:00 pm

The tension between measurements of the Hubble constant (H0) as determined from the "local" and "distant" Universe persists. The Carnegie-Chicago Hubble Program was designed to provide a calibration of the Type Ia Supernovae (SNe Ia) completely independent of the Leavitt Law for Cepheid variables.

Physics Group Meeting at IAS | Daniel Kapec, School of Natural Sciences, IAS | “Soft Particles and Symmetry”

Wed, Oct 17, 2018, 1:45 pm
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Pheno & Vino Seminar | Keith Dienes, U of Arizona | "Dynamical Dark Matter: A New Framework for Dark-Matter Physics" | Jadwin 303

Tue, Oct 16, 2018, 4:00 pm

In this talk, I will provide an introduction to an alternate framework for dark-matter physics which we call "Dynamical Dark Matter" (DDM).  Within this framework, the requirement of dark-matter stability is replaced by a balancing of lifetimes against cosmological abundances across an ensemble of individual dark-matter components with...

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HET Seminar at IAS | John Schwarz, Caltech | “Tree Amplitudes for Some Supersymmetric Theories in Six Dimensions”

Mon, Oct 15, 2018, 2:30 pm

All of the tree amplitudes are constructed for four supersymmetric theories in six dimensions using spinor-helicity variables and the CHY formalism. Two of the theories, the world volume theories of an M5-brane and a D5-brane, only have nonzero amplitudes when n, the number of particles, is even.

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Biophysics Seminar: Simon Sponberg, Georgia Tech

Mon, Oct 15, 2018, 12:00 pm

Emergent Simplicity and Multiscale Mechanisms of Agile Animal Movement

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HET Seminar | Avner Karasik, Weizmann Institute | "On the phase diagram of SU(N)XSU(N) gauge theory with bifundamental Fermion" | PCTS Seminar Room

Fri, Oct 12, 2018, 1:45 pm

We study the phase diagram of SU(N)XSU(N) gauge theory with massive bifundamental Fermion at zero temperature. Assuming that the theory is confining and gapped, some constraints that come from anomalies can be put on the phase diagram as a function of the two theta- angles.

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Gravity Group Lunch Seminar, Brandon Hensley (Princeton) "Dust Polarization and the Quest for Primordial B-Modes"

Fri, Oct 12, 2018, 12:00 pm

In even the cleanest regions of the sky, polarized emission from our Galaxy is a limiting contaminant for the detection of primordial gravitational waves via a B-mode polarization signature in the Cosmic Microwave Background (CMB).

Hamilton Colloquium Series: Timothy Koeth, University of Maryland "The Physicists in the Basement of the High Castle" Jadwin A10

Thu, Oct 11, 2018, 4:00 pm

1944 saw the height of the United States Manhattan Project efforts which was distributed between Los Alamos New Mexico, Oak Ridge Tennessee, and Hanford Washington.  Since the Manhattan Project was spurred by the fear that Germany was building her own nuclear weapons, Allied anxiety continuously pondered the Nazi atomic progress....

Audience: A free lecture open to the public.
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Informal HET Seminar at IAS | Grant Remmen, University of California, Berkeley | “Weak Gravity Conjecture from Black Hole Entropy”

Thu, Oct 11, 2018, 1:45 pm

We prove that higher-dimension operators contribute positively to the entropy of a thermodynamically stable black hole at fixed mass and charge. Our results apply whenever the dominant corrections originate at tree level from quantum field theoretic dynamics.

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Evnin Public Lecture - Nergis Mavalvala, MIT

Wed, Oct 10, 2018, 7:00 pm

The Evnin Lectures were established with a gift from Anthony B. Evnin '62 to promote a broader and deeper understanding of the critical roles of science, technology, engineering and mathematics (STEM) in all aspects of human endeavor.

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Physics Group Meeting at IAS | Juan Maldacena, School of Natural Sciences, IAS | “Review of the KKLT Construction of de-Sitter Vacua of String Theory”

Wed, Oct 10, 2018, 1:45 pm

Suggested reading:

https://arxiv.org/abs/1808.08971    
A comment on effective field theories of flux vacua 
Shamit Kachru, Sandip P. Trivedi

and references therein.

Further references:

Review on flux vacua:

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Pheno & Vino Seminar | Christian Boutan, PNNL | "Hunting Dark Matter with the Axion Dark Matter eXperiment (ADMX)" | Jadwin 303

Tue, Oct 9, 2018, 4:00 pm

The Axion Dark Matter eXperiment (ADMX) is a DOE "Generation 2" direct-detection dark matter project searching for the resonant conversion of axions to photons in a tunable, high-Q microwave cavity surrounded by a strong magnetic field.

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HET Seminar | Miroslav Rapcak, Perimeter Institute | "The Vertex Operator Algebra Vertex" | PCTS Seminar Room

Tue, Oct 9, 2018, 3:00 pm

Over the past two decades, Vertex Operator Algebras (VOA) have appeared in various contexts in gauge theory. I will discuss a class of VOAs arising as algebras of local operators at junctions of interfaces in four-dimensional N=4 super Yang-Mills theory.

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HET Seminar | Martin Kruczenski, Purdue University | “The S-matrix bootstrap for the 2d O(N) non-linear sigma model" | PCTS Seminar Room

Mon, Oct 8, 2018, 2:30 pm

In this talk I will discuss how to apply the S-matrix bootstrap maximization program to the 2d bosonic O(N) integrable model which has N species of scalar particles with mass m and no bound states.

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Biophysics Seminar: Charles Stevens, The Salk Institute and the Kavli Institute, UCSD

Mon, Oct 8, 2018, 12:00 pm

Shared properties of the fly olfactory system and the monkey human face patch neurons

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Special Condensed Matter Seminar | Maciej Koch-Janusz, ETH Zurich | "Machine learning and the renormalization group" | Jadwin 343

Fri, Oct 5, 2018, 1:30 pm

Physical systems differing in their microscopic details often display strikingly similar behaviour when probed at macroscopic scales. Those universal properties, largely determining their physical characteristics, are revealed by the renormalization group (RG) procedure, which systematically retains ‘slow’ degrees of freedom and integrates out...

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Hamilton Colloquium Series: David Poland, Yale University, "Critical Phenomena and the Conformal Bootstrap" Jadwin A10

Thu, Oct 4, 2018, 4:00 pm

From critical phenomena to quantum gravity, conformal field theories describe the universal scale-invariant structures that lie at the heart of theoretical physics. The conformal bootstrap is the powerful idea, dating back to the 70’s, that one can use fundamental consistency conditions to constrain, solve, and map out the space of conformal ...

Audience: A free lecture open to the public.
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Pheno & Vino Seminar | Marilena Loverde, Stony Brook | "Light relics in the CMB" | Jadwin 303

Tue, Oct 2, 2018, 4:04 pm

Neutrinos and other light relic particles leave a number of imprints in the cosmic microwave background anisotropies and on maps large-scale structure of the universe.

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HET Seminar at IAS | William Donnelly, Perimeter Institute | "Entanglement Branes and Extended Topological Quantum Field Theory”

Mon, Oct 1, 2018, 2:30 pm

Entanglement is an important property of quantum systems, but its precise definition in field theory poses some challenges. The problem is particularly acute in gauge theories and string theory, where extended objects such as Wilson loops and strings preclude any local factorization of the Hilbert space.

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HET Seminar | Amos Yarom, Technion & Princeton University | "New constraints on transport from Schwinger Keldysh theory" | PCTS Seminar Room

Fri, Sep 28, 2018, 1:45 pm

After a review of a novel low energy effective action for the Schwinger-Keldysh generating function, I will describe how it captures information on the entropy current, Onsager relations, and new constraints on transport.

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