Laser cooled atom cloud viewed through microscope camera. Credit: University of Otago In a first for quantum physics, University of Otago researchers have “held” individual atoms in place and observed previously unseen complex atomic interactions. A myriad of equipment including lasers, mirrors, a vacuum chamber, and microscopes assembled in Otago’s […]

It is like jumping on and off a carousel: what happens to neutrons changing from a non-rotating frame of reference into a rotating frame of reference — and back? 30 years ago, scientists predicted that this would lead to interesting interference effects, because neutron spin show a special kind of […]

A Higgs boson decays in this collision recorded by the ATLAS detector on May 18, 201 (Image: © ATLAS) Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host Ask a Spaceman and Space Radio, and author of “Your Place in the Universe.” Sutter contributed this article to Space.com’s Expert […]

Two electrons and two holes, created by light quanta, held together by a chessboard-like background. Credit: TU Wien They had been looking for something completely different, but they found a previously unknown quasi-particle they named pi-ton: A bound state of two electrons, two holes, and light. In physics, there are […]

How Supercomputers Helped Link Quantum Entanglement to Cold Coffee Theoretical physicists from Trinity have found a deep link between one of the most striking features of quantum mechanics – quantum entanglement – and thermalization, which is the process in which something comes into thermal equilibrium with its surroundings. Their results were […]

Having studied quark-gluon plasma since the late 1970s, Dr. Johann Rafelski summarizes the evolution in our understanding of the exotic quark signature of this primordial material which once filled the whole Universe. Physicists believe that in the Universe’s first ten microseconds free quarks and gluons filled all of spacetime, forming a new […]

This image, magnified 25,000 times, shows a section of a prototype accelerator-on-a-chip. The segment shown here are one-tenth the width of a human. The oddly shaped gray structures are nanometer-sized features carved in to silicon that focus bursts of infrared laser light, shown in yellow and purple, on a flow […]