Events Archive

Special Seminar , Thurs, June 27, 10:30 AM, PNI PSH 101, Meital Oren-Suissa, Weizmann Institute of Science, "Evolution and design of sexually dimorphic neuronal circuits"
Thu, Jun 27, 2024, 10:30 am11:30 am

The two sexes of a species can display marked differences in essential behaviors such as feeding or escape from dangers, but the mechanisms underlying such behavioral dimorphism are poorly understood. In our work, we trace the molecular and cellular events that generate sexually dimorphic circuits at the single synapse and gene level. For…

Speaker
Special Seminar - 2PM - Frederico Roccati (Columbia U) "Quantum optics in (non-)Hermitian topological photonic reservoirs" - Jadwin JH room
Wed, May 15, 2024, 2:00 pm3:00 pm

Topology and quantum optics are two fields whose interplay can give rise to new physics [1]. By properly designing a photonic lattice (i.e., the structured reservoir), it is possible to engineer photon-mediated spin Hamiltonians between quantum emitters coupled to it. In particular, it is possible to endow photonic structures with Hermitian or…

Speaker
Faculty, post docs, grads
Special Condensed Matter Seminar - 3/14 - 3PM - Chen Fang "Many-body scar models from a symmetry perspective" - Jadwin JH room
Thu, Mar 14, 2024, 3:00 pm4:30 pm

Recently, a class of many-body Hamiltonians have been found to show exact periodic dynamics in the continuum of the energy spectrum where thermalization and chaos is expected. This phenomenon is known as the (exact) quantum many-body scar (QMBS) dynamics. We show that a wide range of QMBS models, plus many new ones, can be unified and…

Speaker
Faculty, post docs, grads
Bootstrapping Black Holes - Henry Lin - Stanford University
Tue, Feb 27, 2024, 2:30 pm3:30 pm

Abstract: Two necessary ingredients of any quantum description of a black hole are strong coupling and a large number of degrees of freedom. Solving such quantum systems is therefore challenging, both analytically and numerically. We will discuss an alternative “matrix bootstrap” method that overcomes some of these challenges. After…

Faculty, post docs, grads
Special Seminar - 2/27 - 12PM - Zhurun (Judy) Ji (Stanford) "Probing topological and correlated states via nanoscale electrodynamics" - Jadwin Hall JH room
Tue, Feb 27, 2024, 12:00 pm1:30 pm

Nanoscale electrodynamics offers a unique perspective for unraveling the complex physics underlying these phenomena. This talk is focused on our studies on the intricate relationships among topology, geometry, and electron correlations in systems with flat bands. I will first discuss the exploration of a 3D quasi-crystalline system,…

Speaker
Faculty, post docs, grads
Special Seminar - 2/26 - 12PM - Shaowen Chen "Visualizing Josephson Current with an Atomic Magnetometer" - Jadwin Hall PCTS
Mon, Feb 26, 2024, 12:00 pm1:30 pm

Characterization and quantum control of complex quantum matter is one of the shared goals for condensed matter and quantum information science research. Toward this end, my research uses van der Waals materials to synthesize topological and correlated states, and quantum sensors based on spin defects to uncover their microscopic picture…

Speaker
Faculty, Staff, Grads, Postdocs, Undergrads
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
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-wave…

Faculty, post docs, grads
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
Special Seminar - Building topological materials from thermodynamic topological defects - Jadwin 343 - 1 PM
Tue, Dec 12, 2023, 1:00 pm2:00 pm

Topological defects in thermodynamic phases are characterized by winding
numbers of order parameters. Similarly, topological phases in the tenfold
classification of insulators and superconductors are characterized by Chern and
winding numbers. We show that both situations can be described by a single
formalism, using…

Speaker
Faculty, post docs, grads
Special Seminar - Non-Bloch band theory in arbitrary dimensions: the stable and the fragile - Jadwin A09 - 2 PM
Mon, Dec 11, 2023, 2:00 pm3:00 pm

The non-Hermitian skin effect (NHSE) is a phenomenon that occurs in non-Hermitian lattice systems, in which eigenstates are massively squeezed to the boundary. In our recent works, we propose a universal solution to the NHSE under open boundary condition in any spatial dimensions (arXiv: 2212.11743), borrowing the concept of amoeba from…

Speaker
Faculty, post docs, grads
Special Seminar w/Dicke Candidate Diego Venegas Vargas (UTK): "Final Results from the PROSPECT-I Reactor Antineutrino Experiment" , Nov 29, 2023 at 2:00pm, JH Room
Wed, Nov 29, 2023, 2:00 pm3:00 pm

The discovery of the neutrino stands as pivotal milestone in the annals of modern physics. Following the initial detection of neutrinos, a diverse array of experiments employing both natural and artificial sources of neutrinos have played a crucial role in shedding light on the elusive nature of these particles, including their intriguing…

Speaker
Dicke Candidate - Jiaqui Cai - Engineer topological flat bands in two-dimensional quantum materials - Jadwin 343 - 2 PM
Mon, Nov 27, 2023, 2:00 pm3:00 pm

Condensed matter physicists understand the universe by tracking collective motions of elementary particles, or quasiparticles, many of which parallel elementary particles in the Standard Model. However, the principle of fractionalization uncovers quasiparticles with no Standard Model counterpart. A seminal example is the fractional quantum Hall…

Speaker
Faculty, post docs, grads
PMI/PCCM Seminar: Tracing Electrons in Organic Optoelectronic Materials
Wed, Nov 8, 2023, 12:00 pm1:00 pm

Abstract: Organic semiconductors are appealing for optoelectronic devices like solar cells and lighting and displays due to their low fabrication cost and energy input, tunable band gaps, and mechanical characteristics like their light weight and flexibility. However, these materials made of light atoms have low dielectric…

Faculty, post docs, grads
Machine learning meets quantum many-body physics - Juan Felipe Carrasquilla Alvarez, Vector Institute for Artificial Intelligence
Wed, Oct 4, 2023, 4:30 pm5:30 pm

Abstract: In this talk, I will discuss our work on using models inspired by natural language processing in the realm of many-body physics. Specifically, I will demonstrate their utility in reconstructing quantum states and simulating the real-time dynamics of open quantum systems. Finally, I will show the efficacy of using these models for…

Faculty, Postdocs, graduate students
Title: Foundation Models for Science: What happens if we train large (language) models on scientific data? - Shirley Ho
Mon, Sep 25, 2023, 4:30 pm5:30 pm

Abstract: In recent years, the fields of natural language processing and computer vision have been revolutionized by the success of large models pretrained with task-agnostic objectives on massive, diverse datasets. This has, in part, been driven by the use of self-supervised pretraining methods which allow models to utilize far more training…

Faculty, Postdocs, graduate students
Special Seminar:Josephson junction arrays as a platform for topological phases of matter|Omri Lesser (Weizmann Inst)|May 4 @3:30pm Joseph Henry Rm
Thu, May 4, 2023, 3:30 pm5:00 pm

The search for low-dimensional topological superconductivity is fueled by the promise of new and exotic physics, such as chiral superconductivity and non-Abelian anyons. However, the need to break time-reversal symmetry, usually by applying a relatively large external magnetic field, has hindered the realization of these novel phases of matter…

Speaker
Physics faculty, post docs, grads
Condensed Matter:Instanton Density Operator in Lattice QCD from Higher Category Theory | Jingyuan Chen ,Tsinghua University (Beijing)|A06 5/1 @2PM
Mon, May 1, 2023, 2:30 pm3:30 pm

A long standing problem in lattice QCD is to construct an explicit instanton density operator on the lattice. We introduce such a construction, after suitably refining the lattice Yang-Mills action, so that it captures the continuum Yang-Mills theory better than the traditional lattice Yang-Mills action does. This refinement needed follows…

Speaker
Physics faculty, post docs, grads
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…

Speaker
Physics faculty, post docs, grads