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

Astronomer Frank Drake dies

On Friday, September 2, 2022, at the age of 93, American astronomer Frank Drake, who became one of the pioneers of the search for radio signals from extraterrestrial civilizations, died. He is also one of the creators of the records for the Pioneer and Voyager probes and the Arecibo radio message, according to the SETI… Continue reading Astronomer Frank Drake dies

The burial of a “vampire woman” with a sickle on her neck and a castle on her leg was found in Poland.

Archaeologists have discovered the burial of a “vampire woman” in Poland dating back to the 17th century. An iron sickle lay across the deceased's neck, and there was a padlock on the big toe of her left foot. As reported by Arkeonews, perhaps the reason for the unusual ritual was the appearance of the deceased.… Continue reading The burial of a “vampire woman” with a sickle on her neck and a castle on her leg was found in Poland.

The algorithm determined the mouse's pain level based on its muzzle expression

American scientists have developed a cloud platform that can assess the severity of pain in black laboratory mice. She analyzes the expression of the animal's face – the position of its nose, ears, whiskers and the degree of squinting of the eyes. Previously, researchers coped with this task manually, but, as the results show, the… Continue reading The algorithm determined the mouse's pain level based on its muzzle expression

Physicists were able to obtain acoustic frequency combs at 10 gigahertz

American physicists have manufactured a hybrid system from a nonlinear oscillatory circuit and an acoustic resonator connected by a piezoelectric contact. This combination made it possible to impart nonlinearity to acoustic modes at a frequency of 10 gigahertz. The authors were able to generate coherent acoustic frequency combs in their setup, which will help combat… Continue reading Physicists were able to obtain acoustic frequency combs at 10 gigahertz

James Webb takes its first direct image of an exoplanet

The James Webb Infrared Space Observatory has captured its first direct image of superjupiter HIP 65426b as it orbits the yellow-white dwarf in a wide orbit. The image made it possible to clarify the parameters of the planet and prove the high efficiency of the observatory in direct observations of exoplanets. A preprint of the… Continue reading James Webb takes its first direct image of an exoplanet

Short breaks during the day helped workers cope with fatigue

Small breaks during the workday help you feel more alert, less tired and more productive. This was found by Romanian psychologists who conducted a meta-analysis of 22 studies published over the past 30 years. Article published in the magazine PLoS ONE. In modern culture, work and personal space no longer have clear boundaries, and more… Continue reading Short breaks during the day helped workers cope with fatigue

A galaxy merger could extinguish a burst of star formation.

Astronomers have found for the first time an example of the result of the merger of two galaxies, where the merger process itself inhibited the formation of new stars, throwing out most of the cold gas reserves from the galaxies. In the case of SDSS J1448+1010, about 47 percent of the material needed to form… Continue reading A galaxy merger could extinguish a burst of star formation.

Astronomers have not found a dense atmosphere near a hot super-Earth

Astronomers, thanks to the TESS and Spitzer telescopes, have determined that the hot super-Earth GJ 1252b is not capable of having a dense atmosphere, even with a high initial pressure at the surface of the planet or a high carbon content in the magma. Instead, it may be surrounded only by a tenuous exosphere, replenished… Continue reading Astronomers have not found a dense atmosphere near a hot super-Earth

James Webb finds organic molecules in icy particles around a very young protostar

The James Webb Infrared Space Telescope has reliably discovered a number of organic molecules, including complex ones, in the composition of ice particles in the core of the very young protovesche IRAS 15398−3359. In addition, the telescope examined the structure of one of the outflows of matter from the protostar, which consists of four shells.… Continue reading James Webb finds organic molecules in icy particles around a very young protostar