European physicists have studied in detail the interaction of single photons in a photonic crystal waveguide containing a quantum dot. They showed that by varying the duration of the pulses and their delay, it is possible to achieve varying degrees of nonlinearity, as well as control the degree of correlation of light quanta. The study… Continue reading Nonlinearity of quantum dot waveguide helps entangle photons
Archaeologists have discovered in Norway the shaft of a medieval arrow, the broken shank of which was repaired by a hunter using sinew. However, apparently, then he was unsuccessful again and his shot missed the target, burying the arrow for several centuries under snow and ice. As the Secrets of the Ice project team reports… Continue reading In Norway, a repaired arrow from an unlucky hunter was found that had melted from under the ice.
German physics teachers made a universal spectrometer in the Czerny-Turner scheme using LEGO constructors and scrap materials. The authors showed that it can be used to study the spectra of atomic emission, transmission, reflection and fluorescence. Reconfiguring the device for different tasks takes a few minutes, and the total cost of the device does not… Continue reading Spectrometer based on LEGO constructor will make studying physics cheaper
Physicists from 13 countries presented the results of a study of the relative frequency of production of short-range two-nucleon correlations in the lightest mirror nuclei containing three nucleons. The data were obtained for a certain kinematic range during electron scattering by nuclei. The collaboration found that in light nuclei, neutron-proton pairs are formed approximately twice… Continue reading Mirror light nuclei differed from heavy ones in the frequency of nucleon pair production
American physicists were able to induce anti-Stokes superfluorescence of one or several lanthanide-doped nanoparticles at room temperature. The rate of collective emission of ions turned out to be four orders of magnitude greater than ordinary luminescence. This research opens the way to the use of single nanoparticles in the creation of optical processors. The study… Continue reading Superfluorescence on single nanoparticles was obtained at room temperature
Astronomers have concluded that the unusual narrow-band radio signal recorded in the direction of the Kepler-438 exoplanet system last year by the FAST telescope is not a technosignature, but is of anthropogenic origin. This is indicated by the polarization properties of the signal. A preprint of the work was published on arXiv.org. To answer the… Continue reading A candidate for an artificial radio signal from an Earth-like exoplanet turned out to be of terrestrial nature
Astronomers have discovered two jets of relativistic plasma near the active galaxy NGC 2663, close to the Milky Way, which are characterized by amazing smoothness and enormous length, reaching more than a million light years. For one of them, scientists observed for the first time jet recollimation on a kiloparsec scale, which manifests itself in… Continue reading Astronomers have found very long radio jets near a nearby active galaxy
The James Webb Infrared Space Telescope has captured new images of the Jupiter system. On them, in addition to details in the planet’s atmosphere and auroras, you can see the rings of Jupiter and a couple of its satellites, according to the NASA website. The Jupiter system, like the gas giant itself, represents important targets… Continue reading James Webb saw auroras on Jupiter
The United States has approved gene therapy for beta thalassemia, an inherited blood disease. The developer of the drug, Bluebird bio, claims that one injection is enough to, if not cure, then significantly improve the patient’s condition. But such an injection would cost $2.8 million. This is 700 thousand dollars more expensive than the Zolgensma… Continue reading The most expensive drug in the world is a new therapy for beta thalassemia. One injection costs $2.8 million
Archaeologists excavated three mounds from the era of early nomads in the West Kazakhstan region, which contained the remains of ten people who died at the end of the 6th – beginning of the 5th century BC. The burial ritual and accompanying grave goods suggested that the graves contained eight male warriors, a teenage girl… Continue reading The burials of eight male warriors and a female priestess from the era of early nomads have been excavated in Kazakhstan.