Atoms in a crystal form a regular lattice, in which they can move over small distances from their equilibrium positions. Such phonon excitations are represented by quantum states. A superposition of phonon states defines ...
Condensed Matter
May 30, 2023
0
211
It's not easy to make sense of quantum-scale motion, but a new mathematical theory developed by scientists at Rice University and Oxford University could help—and may provide insight into improving a variety of computing, ...
General Physics
Feb 23, 2023
0
184
Scientists have created the first "time-crystal" two-body system in an experiment that seems to bend the laws of physics.
Condensed Matter
Jun 2, 2022
0
2734
This crystal lattice consists of a large number of unit cells with an identical atomic arrangement. In the elementary adiabatic picture, the motions of electrons in the crystal follow the motion of the atomic nuclei instantly, ...
Condensed Matter
Apr 1, 2022
0
207
Energy-efficient spintronic devices are closer to being realized thanks to a new mechanism predicted by RIKEN physicists for converting between electrical current vortices and a spin current.
Nanophysics
Jul 14, 2021
0
165
In a recent publication in Science, researchers at the University of Paderborn and the Fritz Haber Institute Berlin demonstrated their ability to observe electrons' movements during a chemical reaction. Researchers have long ...
Condensed Matter
Dec 27, 2018
3
3414
One of the most enduring "Holy Grail" experiments in science has been attempts to directly observe atomic motions during structural changes. This prospect underpins the entire field of chemistry because a chemical process ...
Optics & Photonics
Oct 9, 2018
1
147
Researchers at the Department of Energy's Oak Ridge National Laboratory made the first observations of waves of atomic rearrangements, known as phasons, propagating supersonically through a vibrating crystal lattice—a discovery ...
General Physics
May 17, 2018
0
174
With its suspended metallic spheres that clack back and forth, Newton's cradle is more than a popular desktop plaything. It has taught a generation of students about conservation of momentum and energy. It is also the inspiration ...
Quantum Physics
May 2, 2018
0
36
A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons ...
Optics & Photonics
Feb 27, 2018
4
110
