Events Archive

Mathematical Physics Seminar, Tues, Feb 20, 4:30pm, Jadwin A06, Gilles Parez, University of Montreal,"The Fate of Entanglement"
Tue, Feb 20, 2024, 4:30 pm5:30 pm

Entanglement is a fundamental property of quantum mechanics, and plays an increasing role in our understanding of many-body systems, in and out of equilibrium. In multipartite systems, different forms of entanglement can exist between various sets of particles, and its detection, even theoretical, remains an outstanding challenge. In this talk,…

Speaker
Dark Cosmos Seminar - 2/20 - 4PM - David Dunsky (NYU) "Primordial Black Holes from Axion Domain Wall Collapse" - Jadwin JH room
Tue, Feb 20, 2024, 4:00 pm5:30 pm

Besides providing a possible explanation to the strong CP problem and dark matter, the QCD axion possesses a rich cosmology. For example, if PQ breaking occurs after inflation, then axion cosmic strings form. Near the QCD phase transition, every axion string become attached to a domain wall which pull on the strings and cause the string-wall…

Speaker
Faculty, post docs, grads
HET Seminar |Masahito Yamazaki, IPMU| “Exploring Theta-Vacua of 4d Pure Yang-Mills Theories” | PCTS
Mon, Feb 19, 2024, 2:30 pm3:30 pm

We study 4d SU(N) pure Yang-Mills theory with a topological theta-angle. It has been a long standing problem to study the theta-dependence of the free energy, and to settle on the fate of the CP symmetry at theta=pi. In this talk we introduce a new lattice gauge theory technique called the "subvolume method", which…

Biophysics Seminar: Douglas Shepherd | Arizona State University |Exploring the 'rules of life' through optical microscopy
Mon, Feb 19, 2024, 12:30 pm1:30 pm

One governing principle of the microscopic world is "predictable randomness," where snapshots of a fluctuating process may appear random, but the average outcome of the process is predictable. An exciting frontier in biological physics is evaluating if predictable randomness extends to more complex, multi-component biophysical systems, such as…

Speaker
Open to the Public
IAS HET Seminar | Aron Wall, Member, School of Natural Sciences, IAS; University of Cambridge| “What is the Symmetry Class of Bulk Holography?” | Bloomberg Lecture Hall & Zoom
Fri, Feb 16, 2024, 11:00 am12:00 pm

The TTbar deformation is a holographic theory describing holography a finite distance in the bulk.   If this theory can be UV completed, it could be a model of nonperturbative bulk quantum gravity.  However, it seems to be a non-unitary theory, as the energy eigenvalues lie either on the real axis or the…

Princeton Physics Preview Program (P4) Scholars Program
Thu, Feb 15, 2024Sat, Feb 17, 2024

The P4 Scholars Program is a three day transformative opportunity for scholars to engage with the Department of Physics with the foal of enhancing their academic and professional journeys as they prepare to apply for graduate programs. 

Faculty, Staff, Grads, Postdocs, Undergrads
Mathematical Physics Seminar, Tues, Feb 13, 4:30pm, PGI Open Space, Tom Stoiber, Yeshiva University, "Violations of Bulk-Edge Correspondence for Topological Insulators"
Tue, Feb 13, 2024, 4:30 pm5:30 pm

Bulk-edge correspondence is an important part of the theory of topological insulators which relates topological invariants in the bulk of an insulator to those of its topologically protected edge modes. Despite numerous rigorous proofs, this paradigm has recently been shown to fail in continuum models for topological phases where the…

Speaker
Special Seminar - 2/13 - 12 PM - Aviram Uri (MIT) "Nanoscale magnetic imaging and multi-moiré magic" - Jadwin JH room
Tue, Feb 13, 2024, 12:00 pm1:00 pm

Understanding strongly correlated topological quantum phases has been a longstanding challenge. Moiré materials present a unique opportunity as they allow us to engineer flat topological bands and vary the carrier density throughout entire bands in situ using electrostatic gates. I will open the talk by presenting nanoscale images of…

Speaker
Faculty, post docs, grads
IAS HET Seminar | Zohar Komargodski, SCGP, Stony Brook University | “Semi-Classical Physics at Large Quantum Numbers” | Bloomberg Lecture Hall (IAS) & Zoom
Mon, Feb 12, 2024, 2:30 pm3:30 pm

We will discuss excitations with large spin and/or large particle number. For conformal theories this corresponds to investigating particular trajectories of heavy operators.

We find trajectories with large approximate degeneracy and show that they can be understood as coherent rotating fluids with…

Biophysics Seminar: Ben Eysenbach | Princeton University | Contrastive Successor Representations
Mon, Feb 12, 2024, 12:30 pm1:30 pm

Goal-reaching problems are ubiquitous in both the natural and engineered world. While learning to achieve goals is often considered an aspect of intelligence in biological systems, it is challenging to design practical algorithms for learning such behavior in high-dimensional environments. In this talk, I'll discuss recent work on contrastive…

Speaker
Open to the Public
Condensed Matter Seminar - 2/12 - 12PM - Haim Beidenkopf "Topology and symmetry breaking in a Weyl-Kagome semimetal" - Jadwin Hall PCTS
Mon, Feb 12, 2024, 12:00 pm1:30 pm

Many of the topological Weyl semimetals host also a Kagome crystal structure that together result in extremely rich electronic phenomenology. The bulk Weyl nodes and the diverging Berry curvature associated with them give rise to an intricate bulk-boundary correspondence hosting open-contour Fermi-arc modes on certain surfaces. The Kagome…

Speaker
Faculty, post docs, grads
HET Seminar |Ross Dempsey, Princeton| “Phase Diagram of the Two-Flavor Schwinger Model at Zero Temperature” | PCTS
Fri, Feb 9, 2024, 11:00 am12:00 pm

The Schwinger model of two-dimensional quantum electrodynamics is among the oldest and best-studied quantum field theories, and is attracting renewed interest in connection with simulations of quantum lattice Hamiltonians. I will discuss an improved lattice formulation of the model, and show how it drastically…

Now what? Gravitational-wave science in the post-detection era - Tom Callister - University of Chicago -
Thu, Feb 8, 2024, 2:30 pm3:30 pm

Abstract:

 

Gravitational-wave astrophysics is now a reality. Since their first detection in 2015, gravitational waves from about 90 black hole and neutron star collisions have been observed, with hundreds more anticipated in the ongoing LIGO-Virgo-KAGRA observing run extending through 2024. Accordingly, gravitational…

Faculty, post docs, grads
Mathematical Physics Seminar, Tues, Feb 6, 4:30pm, PGI Open Space, Roland Bauerschmidt, Courant Institute of Mathematics, NYU, "The Polchinski Equation, Semiconvexity, and Stochastic Dynamics"
Tue, Feb 6, 2024, 4:30 pm5:30 pm

I will give an overview of a perspective on Polchinski's continuous formulation of the renormalization group, developed over the last few years with T. Bodineau and B. Dagallier, as well as some applications to functional inequalities and sample path regularity of Euclidean field theories.



Time permitting, I will also…

Speaker
Astrophysics and cosmology with gravitational waves and their electromagnetic counterparts: past, present, and future -A. Sylvia Biscoveanu - Northwestern University
Tue, Feb 6, 2024, 2:30 pm3:30 pm

The growing catalog of gravitational-wave signals from compact-object mergers has allowed us to study the properties of black hole and neutron star binaries with increasing precision. However, the processes governing the formation and evolution of these systems and their electromagnetic counterparts remain largely unconstrained. The current…

Faculty, post docs, grads
Quantum Spacetime from a Distance -Jordan Cotler - Harvard University
Mon, Feb 5, 2024, 2:30 pm3:30 pm

Understanding the macroscopic statistical properties of a physical system can provide vital clues to its microscopic characteristics.  I will show that Einstein gravity at long distances contains statistical information about quantum spacetime.  For example, certain wormhole spacetimes encode statistics of quantum black hole…

Faculty, post docs, grads
Biophysics Seminar: Wolfgang Losert | University of Maryland College Park | Sensing Physical Signals with Cytoskeletal Dynamics
Mon, Feb 5, 2024, 12:30 pm1:30 pm

The dynamic assembly and disassembly of the cytoskeleton can create waves and oscillations that are critical to cell migration and other important cell behaviors.  Chemical signals have been found to trigger and steer these waves, facilitating the guidance e.g. of immune cells to their target.   Here we consider the role of these…

Speaker
Open to public
IAS HET Seminar | Greg Moore, Distinguished Visiting Professor, School of Natural Sciences, IAS; Rutgers University | “Update on Supersymmetric Field Theory and Invariants of Smooth Four-Manifolds” | Bloomberg Lecture Hall (IAS) & Zoom
Fri, Feb 2, 2024, 11:00 am12:00 pm

I will give a lightning review of results on this subject from 1988-1998 and then describe more recent developments, mostly current work in progress.  First, I will describe topological twisting of Lagrangian N=2 d=4 field theories in terms of the general concept of reduction of structure group. Second, I will…

Mathematical Physics Seminar, Tues, Jan 30, 4:30pm, Jadwin A06, David Huse, Princeton University, "Many-body localization"
Tue, Jan 30, 2024, 4:30 pm5:30 pm

I will discuss some of the present conceptual and theoretical (but not mathematical) understanding of the many-body localized (MBL) phase and its instabilities.  In most cases, for the MBL phase to remain stable in the limit of an infinite system this limit needs to be taken differently from the standard thermodynamic limit (Gopalakrishnan…

Speaker
IAS HET Seminar | Yin-Chen He, Perimeter Institute, | “Fuzzy Sphere Regularization of 3D CFTs” | Bloomberg Lecture Hall (IAS) & Zoom
Mon, Jan 29, 2024, 2:30 pm3:30 pm

Conformal Field Theory (CFT) represents a class of quantum field theories that has profound applications across various physics domains, from critical phenomena in statistical mechanics to quantum matter, quantum gravity, and string theory. In this talk, I will introduce our recently proposed 'fuzzy (non-commutative)…