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

Chemists have found ideal conditions for the hydrogen borrowing reaction

Chemists from Russia studied the hydrogen borrowing reaction necessary for the formation of carbon-nitrogen bonds. They found that it often does not require a catalyst at all, and also developed recommendations for successfully carrying out the reaction in the laboratory. The study was published in the journal Journal of Catalysis. Organic compounds containing an NH… Continue reading Chemists have found ideal conditions for the hydrogen borrowing reaction

Bushfire smoke raised temperatures in Australia by three degrees

British climatologists studied the distribution of smoke in the stratosphere after bushfires in Australia in 2019–2020. They found that black carbon particles in the smoke increased the average temperature in the lower stratosphere by 0.7 degrees worldwide, with temperatures rising by three degrees over Australia. Additionally, the reaction of smoke and ozone has caused the… Continue reading Bushfire smoke raised temperatures in Australia by three degrees

MOXIE received 50 grams of oxygen from the Martian atmosphere in 9 hours

The team of the MOXIE experiment to obtain oxygen from the Martian atmosphere presented the results of its work on Mars for 2021. The device installed on the Perseverance rover worked for a total of almost 9 hours, during which time it generated 50 grams of oxygen suitable for human use. Thus, on the basis… Continue reading MOXIE received 50 grams of oxygen from the Martian atmosphere in 9 hours

Coordination polymers caused water to absorb oxygen

Chemists from the USA have developed several microporous materials capable of forming stable colloidal solutions in water and in this form absorbing carbon dioxide and oxygen. To do this, the scientists used compounds with a hydrophilic outer surface and a hydrophobic pore surface. This made it possible to increase the ability of water to dissolve… Continue reading Coordination polymers caused water to absorb oxygen

Oscillations of water droplets on the ISS improve understanding of wetting

American physicists studied the natural vibrations of water droplets on hydrophobic substrates in microgravity conditions. To do this, they sent the necessary materials and equipment to the ISS. By filming the vibrations of the drops on camera, the scientists were able to confirm that their previously developed theory of vibrations of free drops works well.… Continue reading Oscillations of water droplets on the ISS improve understanding of wetting

Quantum walks of atoms helped to search with the oracle

American physicists have experimentally realized quantum walks of neutral strontium-88 atoms in the cells of a two-dimensional optical lattice. The distribution and expansion of the atomic wave function in their work turned out to be in good agreement with the simple model up to a region of a hundred nodes. The scientists also demonstrated how… Continue reading Quantum walks of atoms helped to search with the oracle

NASA has selected 13 candidates for the first landing sites of Artemis astronauts at the lunar south pole.

NASA has presented 13 possible sites for the first landing of American astronauts on the Moon under the Artemis program, which is scheduled for 2025. All of them are located near the south pole of the Moon, well lit and fairly level, and the final choice will be made after the launch date of Artemis… Continue reading NASA has selected 13 candidates for the first landing sites of Artemis astronauts at the lunar south pole.

Planetologists have confirmed the possibility of delivering volatile substances to the young Earth by asteroids

Planetologists presented new results from analyzing soil particles from the Ryugu asteroid in laboratory conditions. It turned out that the temperature inside Ryugu’s parent body could not exceed 30 degrees Celsius, and asteroids like Ryugu could indeed deliver volatile substances to the young Earth. Article published in the magazine Nature Astronomy.The near-Earth 900-meter asteroid Ryugu,… Continue reading Planetologists have confirmed the possibility of delivering volatile substances to the young Earth by asteroids

Poisonous perfluorinated acids decomposed by alkali

Chemists from the USA and China have learned to decompose toxic polyfluorinated carboxylic acids into inorganic products. This process occurred under the action of sodium hydroxide on the acid in an aprotic solvent at elevated temperature. The reaction mechanism was identified and confirmed using computer calculations, scientists write in Science. Polyfluorinated organic compounds are common… Continue reading Poisonous perfluorinated acids decomposed by alkali