E-Mail
IMAGE: Artist s impression of the experiment, where an electric pulse is applied to a titanium atom. As a result, its magnetic moment suddenly flips around. A neighbouring titanium atom (right) reacts. view more
Credit: TU Delft/Scixel
How materials behave depends on the interactions between countless atoms. You could see this as a giant group chat in which atoms are continuously exchanging quantum information. Researchers from Delft University of Technology in collaboration with RWTH Aachen University and the Research Center Jülich have now been able to intercept a chat between two atoms. They present their findings in
Science on 28 May.
The puzzle of how internal OH- impurities affect photon energy upconversion has been quantitatively disentangled through combining internal OH- content manipulation in nanocrystals, spectroscopy and Monte Carlo simulation. The exponential relationship between upconversion luminescence intensity and the quantity of internal OH- was discovered. The work not only paves the way to pursuit new structures and/or doping patterns for higher upconversion efficiency, but also provides a new method for studying the internal defects of phosphors.
Quantum systems are considered extremely fragile. Even the smallest interactions with the environment can result in the loss of sensitive quantum effects. In the renowned journal Science, however, researchers from TU Delft, RWTH Aachen University and Forschungszentrum Jülich now present an experiment in which a quantum system consisting of two coupled atoms behaves surprisingly stable.
E-Mail
IMAGE: From left: Marcel Baer, Nathan Tallent, and Ben Loer are recipients of a 2021 Early Career Research Program award from the U.S. Department of Energy. view more
Credit: Composite image by Shannon Colson | Pacific Northwest National Laboratory
A trio of Pacific Northwest National Laboratory (PNNL) researchers have each received a 2021 Early Career Research Program award from the U.S. Department of Energy (DOE) in the highly competitive program. Awards to DOE-based researchers total $500,000 per year for five years for salary and research expenses.
PNNL recipients are Marcel D. Baer, senior research scientist, and Nathan R. Tallent, computer scientist, both in the Physical and Computational Sciences Directorate; and Ben Loer, physicist in the National Security Directorate.
E-Mail
What does quark-gluon plasma - the hot soup of elementary particles formed a few microseconds after the Big Bang - have in common with tap water? Scientists say it s the way it flows.
A new study, published today in the journal
SciPost Physics, has highlighted the surprising similarities between quark-gluon plasma, the first matter thought to have filled the early Universe, and water that comes from our tap.
The ratio between the viscosity of a fluid, the measure of how runny it is, and its density, decides how it flows. Whilst both the viscosity and density of quark-gluon plasma are about 16 orders of magnitude larger than in water, the researchers found that the ratio between the viscosity and density of the two types of fluids are the same. This suggests that one of the most exotic states of matter known to exist in our universe would flow out of your tap in much the same way as water.