Astrophysics Seminar: What can we learn from the evolution of galaxy sizes?
Kalina Nedkova (Johns Hopkins University)
Galaxies have grown significantly in size since the early Universe. While quiescent galaxies grow primarily through galaxy mergers, star-forming galaxies grow by accreting gas from their surroundings and forming new…
High Energy Theory Seminar: Gravitational atoms and black hole binaries
G.M. Tomaselli (IAS at Princeton University)
Superradiant instabilities may create clouds of ultralight bosons around rotating black holes, forming so-called "gravitational atoms". In this talk, I will review a series of papers that study the effects of a…
Colloquium: Light, Quantum and Energy
Liang Wu (University of Pennsylvania)
The conventional device to convert light to electrical current uses two different kinds of doped silicon merged together known as pn junction or heterostructures. The current only flows one way in the pn junction due…
High Energy Theory Seminar: Candidate de Sitter Vacua
Liam McAllister (Cornell)
I will present Calabi-Yau orientifold flux compactifications of type IIB string theory that yield, at leading order in the string loop and sigma model expansions, de Sitter vacua of the form envisioned by Kachru,…
Astrophysics Seminar: Mapping Cosmic Star Formation with the CO Mapping Array Project
Patrick Breysse (NYU)
I will discuss the results of the second observing season of the CO Mapping Array Project (COMAP). COMAP is a line intensity mapping experiment seeking to probe the cosmic star formation history by mapping the 115…
Condensed and Living Matter Seminar: Van der Waals magnets and antiferromagnets interacting with electron spins
Dan Ralph (Cornell University)
This talk will discuss two projects. The first concerns topological insulator/magnet samples made by mechanical stacking of exfoliated van der Waals flakes. The proximity interaction of the…
High Energy Theory Seminar: Apparent Fine Tunings for Field Theories with Broken Space-Time Symmetries
Alberto Nicolis (Columbia University)
I will exhibit a class of effective field theories that have hierarchically small Wilson coefficients for operators that are not protected by symmetries but are not finely tuned. These theories possess bounded target…
Profs & Pints Philadelphia: Finding the Cosmic Puzzle's Missing Pieces
Mark Trodden (UPenn)
Profs and Pints Philadelphia presents: “Finding the Cosmic Puzzle’s Missing Pieces,” a look at how the fields of astronomy and subatomic physics are working in tandem to shed light on the darkest parts of the…
Condensed and Living Matter Seminar: "Robots that evolve on demand"
Rebecca Kramer-Bottiglio (Yale)
Abstract: Soft robots have the potential to adapt their morphology and behavioral control policy to changing tasks and environments. Inspired by the dynamic plasticity of living materials and general adaptability of…