Department of Physics and Astronomy

J1407b may be surrounded by a vast system of 37 rings stretching 90 million kilometers from its center, according to an astronomical model of a mysterious 56-day eclipse.

In what they call a “weird little corner” of the already weird world of neutrinos, physicists have found evidence that these tiny particles might be involved in a surprising reaction. In an experiment conducted with the international MINERvA collaboration at Fermilab, physics professor Kevin McFarland and his students and colleagues provide evidence that neutrinos can sometimes interact with a nucleus but leave it basically untouched, resulting in a new particle being created out of a vacuum.

"Simulated molecular clouds are beautiful, intricate, and ever-changing -- properties that make them ideal candidates for high-powered visualization," wrote PhD student Erica Kaminski about her award-winning images.

How long can a technological civilization last? Will human-caused climate change or species extinctions threaten its collapse or can industrial development continue without restrictions? In a new paper, two astrophysicists argue that these questions may soon be resolvable scientifically.

Scientists have recently developed several ways—some simple and some involving new technologies—to hide objects from view. The latest effort, developed by physics professor John Howell and graduate student Joseph Choi, not only overcomes some limitations of previous devices, but uses inexpensive, readily available materials in a new way. "This is the first device that we know of that can do three-dimensional, continuously multidirectional cloaking," said Choi.

As a quantum state collapses, it will follow a path known as a quantum trajectory. In a new paper featured this week on the cover of Nature, scientists have shown that it is possible to track these quantum trajectories and compare them to a theory, recently developed by University of Rochester physicists, for predicting the most likely path a system will take.

Physicists have shown that a technique called compressive sensing offers a way to measure both variables at the same time, without violating the Uncertainty Principle.

Physicists have created a silicon nanocavity that allows light to be trapped 10 times longer than in other similarly-sized optical cavities. Nanocavities are key components of nanophotonics circuits.

Streaming jets of high-speed matter produce some of the most stunning objects seen in space. an experiment by French and American researchers using extremely high-powered lasers offers experimental verification of one proposed mechanism for creating them.

Riccardo Betti, professor of mechanical engineering and of physics and astronomy and assistant director for academic affairs at the Laborator for Laser Energetics, was named the inaugural Robert L. McCrory Professor.