Events Archive

Dark Cosmos Seminar - 10/8 - 4 PM - Ethan Nadler (UC San Diego) “Cosmological Simulations with Novel Dark Matter Physics” - Jadwin JH room
Tue, Oct 8, 2024, 4:00 pm5:30 pm

I will present over 100 cosmological zoom-in simulations of Milky Way and strong lens analogs in a variety of dark matter models beyond CDM. The shape of the linear matter power spectrum, P(k), is clearly imprinted on the corresponding subhalo mass functions. Modeling this effect improves fuzzy and interacting dark matter bounds by…

Speaker
Faculty, Postdocs, graduate students
HET Seminar |Zixia Wei, Harvard| “Holographic Dual of Crosscap CFT and Emergent de Sitter Features | PCTS
Mon, Oct 7, 2024, 2:30 pm3:30 pm

I propose a bottom-up correspondence between a CFT defined on 2D non-orientable manifolds, such as the real projective plane (RP2) and the Klein bottle (K2), and AdS3 Einstein gravity with dS2 end-of-the-world branes. In this correspondence, a global dS2 end-of-the-world brane (a quotient by Z2) is described by the unitary time evolution of a…

CPBF Seminar Series with Benjamin Lindner, Humboldt University, Berlin
Mon, Oct 7, 2024, 12:30 pm1:30 pm

Neurons often exhibit considerable fluctuations in their spontaneous (stimulus-free) activity, characterized by correlation functions. Neurons also react to time-dependent stimuli described by response functions. Because the neural raison d'etre is information processing and transmission (shaped by both their fluctuation and response properties…

PHysics/Biophysics faculty, post docs, grad students
PGI Seminar Series Fall 2024 |Maxime Van De Moortel |Rutgers University| "Some Mathematical Aspects of Asymptotically Anti-de-Sitter Black Holes"
Mon, Oct 7, 2024, 12:30 pm1:30 pm

Abstract: The Anti-de-Sitter/Condensed Matter Theory (AdS/CMT) correspondence has attracted significant attention within high-energy physics, particularly in the study of holographic superconductors, which are modeled as asymptotically Anti-de-Sitter (AdS) hairy black holes. In this talk, I will present recent mathematical advancements in the…

IAS HET Seminar -Yichul Choi/ School of Natural Sciences/ "Non-Invertible Symmetries, Boundary Conditions, and Topological Field Theory" Bloomberg Lecture Hall
Fri, Oct 4, 2024, 11:00 am12:00 pm

Abstract: In recent years, there have been various activities trying to better understand the interplay between non-invertible global symmetries and boundary conditions in quantum field theories, with applications ranging from scattering of solitons to symmetry-resolved entanglement entropies. In this talk, I will focus on 1+1d…

Speaker
Condensed Matter Seminar - 10/1 - 12 PM - Markus Mueller (PSI Switzerland) "Emergent quantum coherence in random magnets probes incipient many-body localization”- Jadwin JH room
Tue, Oct 1, 2024, 12:00 pm1:30 pm

Local excitations in magnetic materials are usually highly incoherent, since they dephase very quickly due to mutual interactions. However, there are interesting exceptions to this common lore. Our joint experimental and theoretical study of the random rare-earth magnet LiY1−xTbxF4 [1] reveals that a combination of hyperfine interactions,…

Speaker
Faculty, post docs, grads
CPBF Seminar Series with Josh Atkinson, Princeton University
Mon, Sep 30, 2024, 12:30 pm1:30 pm

Microbes have evolved genetically encoded machinery enabling them to utilize the abundant redox‐active molecules and extracellular minerals. Recently, the machinery enabling these redox reactions have been leveraged for interfacing cells and biomolecules with electrical circuits for biotechnological applications in energy harvesting, chemical…

PHysics/Biophysics faculty, post docs, grad students
PGI Seminar Series Fall 2024 |Hamed Masaood |Princeton Univ/"A Scattering Theory for Linearised Gravity on the Exterior of the Schwarzschild Black Hole"
Mon, Sep 30, 2024, 12:30 pm1:30 pm

I will talk about the scattering problem in general relativity, and present a construction of a scattering theory resolving the problem for the linearised Einstein equations in a double null gauge against a Schwarzschild background. This is done by first constructing a scattering theory for the gauge invariant components of the linearised…

HET Seminar |Jan Albert, Princeton University| “Pushing the S-matrix bootstrap” | PCTS
Fri, Sep 27, 2024, 11:00 am12:00 pm

First introduced in the 60s, positivity bounds for S-matrices have undergone a revival in the past few years, with systematic implementations that improve by the day. Among the recent results are sharp bounds on the EFTs of various gauge and gravitational theories. A common feature of the resulting exclusion regions, however, is that they tend…

Special Seminar - 9/27 - 11 AM - Dr. Haocun Yu (MIT) "Illuminating the Universe’s Mysteries with Quantum Optics"- Jadwin JH room
Fri, Sep 27, 2024, 11:00 am12:00 pm

Abstract: Advanced quantum techniques are revolutionizing our ability to observe and understand the universe. From employing squeezing in LIGO detectors to demonstrate human-scale macroscopic quantum phenomena, to utilizing photon-counting methods for measuring Earth's rotation and detecting dark matter, I will discuss how quantum optical…

Speaker
Faculty, post docs, grads
Dark Cosmos Seminar | 9/24 at 4:00 PM | Jadwin Joseph Henry Room | Pierre Sikivie (University of Florida) | "Axions and the formation of supermassive black holes at cosmic dawn"
Tue, Sep 24, 2024, 4:00 pm5:00 pm

Axion dark matter thermalizes by gravitational self-interactions and forms a Bose-Einstein condensate.  It is shown that the rethermalization of the axion fluid during the initial collapse of large scale overdensities at cosmic dawn transports angular momentum outward sufficiently fast  that black holes form with masses ranging from …

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HET Seminar |Gregory Falkovich, Weizmann Institute| “Sea storm as a problem in field theory” | PCTS
Mon, Sep 23, 2024, 2:30 pm3:30 pm

I shall describe the recent theoretical advances in the description of turbulence in different media.

An important point is how different the meaning of renormalization in turbulence is from what we used to know in the field theory.

For quartic interaction, we were recently able to compute the vertex renormalization and distinguish…

CPBF Seminar Series with Paolo do Los Rios ⎸ Pulling and stretching: how chaperones rescue aggregated proteins and help the stability of the proteome
Mon, Sep 23, 2024, 12:30 pm1:30 pm

Most proteins in the cell are only marginally stable, to allow their flexibility and plasticity and ultimately their easy recycling. The downside is the sensitivity of the structure of proteins to perturbations, in the form of environmental stresses and/or mutation, and the ensuing aggregation, which is in general toxic to all organisms.

HET Seminar |Alessio Miscioscia, DESY| “Exploring thermal CFTs from a bootstrap perspective” | PCTS
Fri, Sep 20, 2024, 11:00 am12:00 pm

In this talk, I will present recent developments in the study of Conformal Field Theories (CFTs) at finite temperature. The motivation for this work is different applications to holography, black holes in AdS as well as statistical physics. Thermal dynamics are constrained by the Kubo-Martin-Schwinger (KMS) condition…

Hamilton Colloquium Series, Ali Yazdani, Princeton University, "Visualizing strongly interacting quantum phases of matter from the Wigner crystal to topological phases for building next generation qubits" , Sep 19, Jadwin A10
Thu, Sep 19, 2024, 4:00 pm5:00 pm

When electrons are forced to interact strongly with each other, some of the most exotic electronic phases and novel quasiparticles may emerge. A key approach to force electrons to strongly interact with one another is to confine them to energy bands with no momentum dispersion, i.e. flat bands. Flat bands can be realized in two-dimensional…

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A free lecture open to the public.
Mathematical Physics Seminar | 9/17 at 4:30 PM | Jadwin A06 | Chris Bourne (Nagoya University) | "Locally Equivalent Pure Gapped Fermionic Ground States and Index Theory"
Tue, Sep 17, 2024, 4:30 pm5:30 pm

The Hartree-Fock-Bogoliubov approximation of superconducting ground states can be naturally described using Araki's self-dual canonical anti-commutation relation (CAR) algebra. Using this framework, we first review the K-theoretic classification of free fermions with an emphasis on unique gapped ground states. Ideas from index theory and coarse…

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Condensed Matter Seminar | 9/17 at 10:30 AM | Jadwin Joseph Henry Room | Prof. Meng Wang (School of Physics, Sun Yat-Sen University) | "High-Tc superconductivity in a nickelate La3Ni2O7"
Tue, Sep 17, 2024, 10:30 am11:30 am

Since the discovery of superconductivity at 80 K in single crystals of La3Ni2O7 at pressures above 14.0 GPa, extensive efforts have been made to understand the properties of the bilayer nickelate system at both ambient and high pressure [1-3]. Density-wave-like orders, structural transition, strange metal behavior, oxygen vacancies,…

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HET Seminar |Shai Chester, Imperial College London| “Monopoles, duality, and QED3” | PCTS
Mon, Sep 16, 2024, 2:30 pm3:30 pm

We consider quantum electrodynamics in 2+1 dimensions (QED3) with N matter fields and Chern-Simons level k. For small values of k and N, this theory describes various experimentally relevant systems in condensed matter, and is also conjectured to be part of a web of non-supersymmetric dualities. We compute the scaling dimensions of monopole…

CPBF Seminar Series with Tzer Han Tan, University of California, San Diego ⎸ Chiral and odd dynamics in living matter
Mon, Sep 16, 2024, 12:30 pm1:30 pm

Chirality is prevalent in nature and plays a crucial role in contexts ranging from left-right symmetry breaking in animal development to shaping material properties in synthetic systems. In this talk, I will discuss how chirality can emerge in multicellular systems, and how collectives of chiral particles exhibit novel material properties such…

PHysics/Biophysics faculty, post docs, grad students