Events Archive

HET Seminar |Howard Georgi, Harvard| “Fun with n-flavor Schwinger models” | PCTS & Zoom
Fri, Apr 28, 2023, 1:45 pm1:45 pm

I will describe the correlators of fermion bilinears in the n-flavor massless Schwinger model. These are exactly calculable generalized free theories. For n > 1, there is a massive particle and a conformal sector. I have argued that in the n = 2 theory, very special mass terms can be added to introduce interactions…

HET Seminar |Yiyang Jia, Weizmann Institute of Science| “Parisi's hypercube, Fock-space frustration and NAdS$_2$/NCFT$_1$ holography” | PCTS & Zoom
Thu, Apr 27, 2023, 2:30 pm2:30 pm

We consider a model of Parisi where a single particle hops on an infinite-dimensional hypercube, under the influence of a uniform but disordered magnetic flux.  We reinterpret the hypercube as the Fock-space graph of a many-body Hamiltonian, and the flux as a frustration of the return amplitudes in Fock space. We…

Dark Cosmos - New precision cosmological constraints from CMB lensing with the Atacama Cosmology Telescope|Matthew Madhavacheril|Joseph Henry [email protected]
Tue, Apr 25, 2023, 4:00 pm5:00 pm

The Atacama Cosmology Telescope is a ground-based CMB survey that has mapped half the millimeter sky at significantly higher resolution and sensitivity than the Planck satellite. I will present new ACT results from a 9400 sq.deg. gravitational lensing mass map, including constraints on the amplitude of matter fluctuations as well as the Hubble…

Physics faculty, post docs, grads
Condensed Matter:Identification and Determination of the Topological Order of a Non-Abelian State (The 5/2 FQHE State)|Moty Heiblum|Braun Center for Sub-Micron Research, Department of Condensed Matter Physics
Tue, Apr 25, 2023, 12:00 pm1:30 pm

Studying non-abelian anyons is exciting due to their unique braiding statistics. The 5/2 quantum Hall state has been long proposed to host such localized quasiparticles in the 2D bulk. Resting on ‘bulk-edge’ correspondence, their gapless edge modes are expected to mirror the topological order of the 5/2 quantum state. Supporting an odd number…

Physics faculty, post docs, grads
Biophysics Seminar: José Alvarado, University of Texas Austin| Connecting active “hardware” to biological “software”
Mon, Apr 24, 2023, 12:30 pm1:30 pm

The actomyosin cytoskeleton is a naturally occurring active gel found in virtually all mammalian cells. Its ability to contract allows cells to move, change shape, exert force, sense stiffness, and maintain constant tension. In order for the “hardware” of actomyosin gels to support such a diverse set of mechanical tasks, it is tightly coupled…

This event is free and open to the public.
Special Seminar: (Machine) Learning of Dark Matter| Lina Necib (MIT)|Joseph Henry Rm @3PM
Fri, Apr 21, 2023, 3:00 pm4:30 pm

In this talk, I present different machine learning and data driven techniques that produce measurements of stellar kinematics around the Milky Way, and relate them to our understanding of Dark Matter. More specifically, I will discuss a data driven technique applied to Gaia DR3 combined with Apogee data to produce the circular velocity…

Physics faculty, post docs, grads
IAS HET Seminar | Dalimil Mazac, Member, School of Natural Sciences, IAS| “Conformal Measure Spaces” | Bloomberg Lecture Hall & Zoom
Fri, Apr 21, 2023, 1:45 pm3:00 pm

The conformal bootstrap equations in general dimension are an infinite set of coupled non-linear equations in infinitely many variables. According to the lore, the solutions of the full set of equations correspond to physical CFTs. At the same time, the only solutions truly known to exist above two dimensions are the mean field theories. In…

FFPS Symposium (day two)
Fri, Apr 21, 2023, 8:30 am2:30 pm

Friday, April 21, 2023
Gravity Initiative
8:30--9:00 am       Breakfast
9:00--10:30 am     Research Talks by Participants (by field, with relevant faculty) 

Donald R. Hamilton Lecture, Thurs. April 20, 2023, S. James Gates (University of Maryland) "SUSY: Fifty Years of Scientific Odyssey Inspiring A Personal Quest"
Thu, Apr 20, 2023, 8:00 pm10:00 pm

The concept that there may exist symmetries relating bosons and fermions was first proposed by Yuri Golfand and Evgeny Likhtman in 1971 and independently realized by Julius Wess and Bruno Zumino in 1974. Thus, was born the topic of ‘supersymmetry’ and the speaker will highlight the triumphs and tragedies of this yet to be observationally…

A free lecture open to the public.
PGI Special Seminar|Cosimo Bambi|Fudan University China|"Testing General Relativity with Black Hole X-ray Data"
Thu, Apr 20, 2023, 2:00 pm3:00 pm

The theory of General Relativity has successfully passed a large number of observational tests. The theory has been extensively tested in the weak-field regime with experiments in the Solar System and observations of binary pulsars. The past 5-6 years have seen significant advancements in the study of the strong-field regime, which can now be…

FFPS Symposium
Thu, Apr 20, 2023, 8:30 amFri, Apr 21, 2023, 2:30 pm

FFPS Symposium

Gravity Initiative
8:30–9:00 am              Breakfast
9:00--9:15 am             Welcome by Herman Verlinde 

Mathematical Physics Seminar, Tues, April 18, 4:30pm, Jadwin A06, Ian Jauslin, Rutgers University, "Non-perturbative Behavior of Interacting Bosons at Intermediate Densities"
Tue, Apr 18, 2023, 4:30 pm5:30 pm

Much attention has been given to systems of interacting Bosons in the dilute regime, where powerful theoretical tools such as Bogolyubov theory give detailed and accurate predictions. In this talk, I will discuss a different approach to studying the ground state of Boson systems, which Carlen, Lieb and I have recently found to be accurate at…

HET Seminar |Yasha Neiman, OIST| “Bulk-local diagrams for higher-spin gravity, using its "BPS black hole" | Jadwin 202& Zoom
Mon, Apr 17, 2023, 2:30 pm3:30 pm

I make a surprising connection between two long-standing problems in higher-spin gravity: (1) locality concerns at the quartic order in perturbation theory, and (2) the physical meaning of the Didenko-Vasiliev "BPS black hole" solution.

I show that the Didenko-Vasiliev solution…

Hamilton Colloquium Series, Immanuel Bloch, Max Planck Institute of Quantum Optics & LMU Munich, "New Avenues for Quantum Simulations with Atoms, Molecules and Photons", April 13, Jadwin A10
Thu, Apr 13, 2023, 4:00 pm5:00 pm

40 years ago, Richard Feynman outlined his vision of a quantum simulator for carrying out complex calculations of physical problems. Today, his dream has become a reality and a highly active field of resarch across different platforms ranging from ultracold atoms and ions, to superconducting qubits and photons. In my…

A free lecture open to the public.
Mathematical Physics Seminar, Tues, April 11, 4:30pm, Jadwin A06, Dan Borgnia, UC Berkeley,"Projected Green's Function Methods Applied to Quasi-Periodic Systems and the Dry Ten Martini Problem"
Tue, Apr 11, 2023, 4:30 pm5:30 pm

The resolvents of finite volume restricted Hamiltonians, GxxΛ(⍵), have long been used to describe the localization of quantum systems. More recently, projected Green's functions (pGfs) -- finite volume restrictions of the resolvent -- have been applied to translation invariant free fermion systems, and the pGf zero eigenvalues have been shown…

Dark Cosmos - Enhancing the early universe from rotating axion field|Dr Nicolas Fernandez|April 11 @4PM
Tue, Apr 11, 2023, 4:00 pm5:30 pm

In this talk, I present a novel scenario in which the unexplored cosmological evolution of the axion field, specifically a rotation in field space, gives rise to the observed dark matter abundance, baryon asymmetry of the Universe, and gravitational waves signatures. This rotation of the axion field provides a natural origin for an era of…

Physic faculty, post docs, grads
Condensed Matter: The Art and Science of Molecular Beam Epitaxy ——From Topological Materials to Interfacial Superconductivity |Cui-Zu Chang, The Penn State Univ |JH Rm @12pm
Tue, Apr 11, 2023, 12:00 pm1:30 pm

Molecular beam epitaxy (MBE) is an epitaxial process by which we could grow single-crystal thin films, heterostructures, and superlattices with the highest achievable purity. Therefore, MBE is known as one of the most advanced and controllable material synthesis methods. In this talk, I will briefly introduce the MBE growth mechanism and then…

Faculty, post docs, grads
IAS HET Seminar | Clay Cordova, University of Chicago| “Higher Symmetry in Particle Physics” | Bloomberg Lecture Hall & Zoom
Mon, Apr 10, 2023, 2:30 pm3:30 pm

Higher symmetries in quantum field theory are novel concepts of symmetry that involve extended operators such as Wilson lines in gauge theory. We briefly review this formalism and then discuss recent applications to particle physics, including an organizing principle for unification models and models of axions. …