Nonlinearity of quantum dot waveguide helps entangle photons

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

Metasurfaces emit entangled photons with variable wavelengths

American and German physicists have fabricated thin metasurfaces consisting of arrays of silicon nanocavities that exhibit spontaneous parametric scattering. They showed that such structures are capable of generating entangled photons. Unlike traditional media used for this, metasurfaces have greater flexibility, which allows the wavelength of the resulting photons to be changed by changing the pump… Continue reading Metasurfaces emit entangled photons with variable wavelengths

Playing music in childhood has been linked to long-term improvements in cognitive abilities.

Playing a musical instrument in childhood and adolescence is associated with improved cognitive skills in later life, British researchers have found. The positive effect persisted even after adjusting for several factors, such as childhood environment. The study was published in Psychological Science. Developed cognitive skills can influence academic and professional achievements, as well as health.… Continue reading Playing music in childhood has been linked to long-term improvements in cognitive abilities.

Evolution forced mammals to recreate salivary proteins fifteen times

American bioinformaticians have discovered traces in the genomes of mammals of 15 independent occurrences of new proteins responsible for the viscosity of saliva. According to the findings of the authors of a study published in Science Advancesthe culprit is a region of the genome with a high mutation rate and selection pressure during the evolutionary… Continue reading Evolution forced mammals to recreate salivary proteins fifteen times

Physicists have learned to control the asymmetrical interaction of levitating particles

Physicists using laser tweezers have learned to control the interaction between two bound levitating nanoparticles that act on each other with different forces. By changing the parameters of the laser beam, scientists controlled the position of the particles, the amplitude and phase of their oscillations, and the force of interaction. The method will make it… Continue reading Physicists have learned to control the asymmetrical interaction of levitating particles

Starlink satellites will be able to connect directly to regular smartphones

The new generation of Starlink satellites will allow anyone with a smartphone to connect to the mobile network and the Internet, even from places where there is no terrestrial coverage. The connection speed will be from two to four megabits per second. This was announced by SpaceX CEO Elon Musk and T-Mobile President Mike Sievert.… Continue reading Starlink satellites will be able to connect directly to regular smartphones

Analysis of 777 ancient genomes clarifies the origins of paleometal populations

Paleogeneticists analyzed 777 ancient genomes from Anatolia, southeastern Europe and western Asia, spanning the last ten thousand years of human history. Focusing on the Palaeometallic Age, scientists found that there was no gene flow from Europe to Anatolia during the entire Bronze Age. In addition, they clarified the influence of representatives of the Yamnaya culture… Continue reading Analysis of 777 ancient genomes clarifies the origins of paleometal populations

The Swedes showed the superiority of buttons and knobs over touch controls in a car

Drivers spend significantly less time operating vehicle functions, such as changing the radio station or selecting the climate control temperature, when they do so using mechanical buttons and knobs rather than a touchscreen. These are the conclusions reached by the Swedish publication Vi Bilägare, which conducted a study with 12 machines and 4 common tasks.… Continue reading The Swedes showed the superiority of buttons and knobs over touch controls in a car

Labeling the usefulness of products prevented the manufacturer from misleading Europeans

Marketers from Germany, in an online survey, analyzed how customers’ perceptions of the dangers or benefits of a product change if either the popular Nutri-Score nutrition label in Europe, or a message about low sugar content, or both, are applied to its packaging. straightaway. Research published in the journal PLoS Oneshowed that the use of… Continue reading Labeling the usefulness of products prevented the manufacturer from misleading Europeans

Scientists have described possible mechanisms of LSD's effect on memory and learning

Researchers from Brazil, the UK and Spain have described the properties of LSD to increase brain plasticity and show a link to improved memory and learning. The results of experiments on a sample of mice and humans were published in Experimental Neurology. In recent decades, researchers have been actively studying the therapeutic properties of psychoactive… Continue reading Scientists have described possible mechanisms of LSD's effect on memory and learning