Spatiotemporal heterogenous dynamics in air-fluidized grains near jamming. The colors represent the average speed over a time interval large enough for grain-sized rms displacement. The most mobile grains are in red, the least are in blue, across the rainbow. Note the stringy correlations of the mobile grains in red. From the lab of Prof. Doug Durian.
Large Synoptic Survey Telescope Site
A rendering of the LSST summit facility. Nearby is Calypso, a small telescope adjacent to the LSST 8-meter telescope. Calypso will monitor the atmosphere.
Penn physicists study graphenes, atomically thin sheets of carbon atoms in a honeycomb lattice. Graphene is the prototype Dirac material hosting a solid state realization of an ultra-relativistic electron gas and accessing new phenomena that are controlled by electric and magnetic fields and by the atomic registry when graphenes are stacked.
Self-assembling Building Blocks
Self-assembling building blocks occur in a diverse set of supramolecular, macromolecular, and other complex systems that impact numerous fields such as industrial dyes and pigments, xerographic receptors, organic semiconductors, transistors, light-emitting diodes and solar cells. Prof. Paul Heiney collaborates with chemists and material scientists on the study of such molecular systems.
Dark Energy Studies
Professor Masao Sako uses Type Ia supernovae to study the expansion history of the universe. The graphs show (left and middle) Hubble diagrams from a simulated 5-year Type Ia sample from the Dark Energy Survey. The right graph shows the 95% confidence limits on dark energy parameters.
This work, "Lassoing saddle splay and the
geometrical control of topological defects," was done with postdoctoral
fellow Max Lavrentovich. The two work with Professors Randy Kamien
(Physics and Astronomy) and Kate Stebe (Chemical and Biomolecular Engineering).