In a recent experiment, published in Physical Review X, Howard Milchberg and his colleagues in the intense laser-matter interactions group demonstrate that femtosecond filaments can set up an extended and robust thermal waveguide structure in air with a lifetime of several milliseconds, making possible the very-long-range guiding and distant projection of high-energy laser pulses and high-average power beams. This is the subject of articles that appear in the latest issues of APS Viewpoint, Physics Today and Science News.
|Physics students Ben Reschovsky and Katie Hergenreder|
It has been more than 15 years in the making, and this fall the college's dreams and aspirations for a state-of-the-art research facility have become a reality as the Physical Sciences Compex (PSC) opens its doors. One of the largest building projects in UMD history in both size and cost, the complex promises to be one of the nation's premier research buildings.
With more than 160,000 square feet of space for collaborative efforts that cross CMNS departments and nearby federal agencies, the PSC is the long-awaited home for leading researchers who are making ground-breaking discoveries about the universe, quantum physics and the battle against disease.
Atomtronics is an emerging technology whereby physicists use ensembles of atoms to build analogs to electronic circuit elements. Modern electronics relies on utilizing the charge properties of the electron. Using lasers and magnetic fields, atomic systems can be engineered to have behavior analogous to that of electrons, making them an exciting platform for studying and generating alternatives to charge-based electronics.
Using a superfluid atomtronic circuit, UMD physicists have demonstrated a tool that is critical to electronics: hysteresis. This is the first time that hysteresis has been observed in an ultracold atomic gas. This research is published in the February 13 issue of Nature magazine, whose cover features an artistic impression of the atomtronic system.