(University of the Witwatersrand) Using geometric phase inside lasers for the first time, researchers find a way to change the orbital angular momentum of laser beams.
Optics & Photonics
Mar 15, 2016
0
89
When one atom first meets another, the precise nature of that interaction can determine much about what kinds of physical properties and behaviours will emerge.
Quantum Physics
Feb 22, 2016
0
11
The concepts of rotation and angular momentum play a crucial role in many areas of physics, ranging from nuclear spectroscopy to molecular collisions and precision measurements. In a paper appearing in the leading physics ...
Quantum Physics
Feb 16, 2016
0
56
By analyzing the highest-energy proton collisions at the Relativistic Heavy Ion Collider (RHIC), a particle collider at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory, nuclear physicists have gotten ...
General Physics
Feb 16, 2016
7
2811
For the first time, scientists have entangled four photons in their orbital angular momentum. Leiden physicists sent a laser through a crystal, thereby creating four photons with coupled 'rotation'. So far this has only been ...
Quantum Physics
Feb 3, 2016
5
1310
"Spintronics" is a new class of electronics where charge and spin are utilized. A pure spin current, flow of spin without charge current, is one of the important physical quantities in its field, which could play an essential ...
General Physics
Dec 16, 2015
0
11
Researchers at Chalmers University of Technology have for the first time reported the electrical detection of spin current on topological insulator surfaces at room temperature by employing a ferromagnetic detector. The findings ...
Nanophysics
Dec 7, 2015
0
1735
Rare earth elements are used in computer hard drives, electric motors and to generate and amplify the lasers at Lawrence Livermore's National Ignition Facility (NIF). Future applications may include serving as memory for ...
Materials Science
Oct 15, 2015
0
41
An international group of physicists has traced the origin of an electromagnetic interaction to the Dirac equation, a fundamental equation of quantum physics.
Quantum Physics
Oct 12, 2015
13
3417
It's easy to contemplate the wave nature of light in common experience. White light passing through a prism spreads out into constituent colors; it diffracts from atmospheric moisture into a rainbow; light passing across ...
General Physics
Sep 23, 2015
5
2167
