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

Ice-resistant self-propelled platform “North Pole” went on its first voyage

The research vessel North Pole has set out on its maiden voyage, the Arctic and Antarctic Research Institute said in a statement. It will carry an expedition to the Central Arctic, which will continue the research of the region begun in the 1930s. The 41st Arctic drifting polar station will continue regular research of the… Continue reading Ice-resistant self-propelled platform “North Pole” went on its first voyage

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

One atom emits fourteen entangled photons

German physicists have reported the successful generation of entangled multiqubit states on photons using a single atom placed in a cavity. They managed to involve 12 photons in the creation of cluster states, and 14 photons of Greenberger-Horn-Zeilinger states. The frequency of generation and detection of entangled photonic chains based on the proposed scheme turned… Continue reading One atom emits fourteen entangled photons

The ice-resistant self-propelled platform “North Pole” was put into operation

The construction of the ice-resistant self-propelled platform “North Pole” has been completed and the vessel has been put into operation, according to a statement from the Arctic and Antarctic Research Institute received by the editors N+1. The ship will set off on its first voyage on September 1. It will allow scientists to continue regular… Continue reading The ice-resistant self-propelled platform “North Pole” was put into operation

Physicists saw Rabi oscillations using extreme ultraviolet light

European physicists have reported the observation of characteristic doublets in the spectra of electrons knocked out of helium atoms by coherent light in the extreme ultraviolet range. The result obtained indicates the occurrence of Rabi oscillations in atoms. The shape and position of the doublets could be theoretically reproduced only after taking into account the… Continue reading Physicists saw Rabi oscillations using extreme ultraviolet light

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

Electrical brain stimulation improves memory in older adults

American neurophysiologists have discovered that transcranial electrical stimulation of the brain helps improve short- and long-term memory. To do this, elderly participants in the experiment were stimulated with alternating current for 20 minutes for four days in a row. Memory improvements after therapy persisted in the subjects for one month. The study was published in… Continue reading Electrical brain stimulation improves memory in older adults

Americans have developed a clamshell monitor with two screens

The American company Mobile Pixels Inc presented a clamshell monitor: it consists of two separate screens, the angle between which can be adjusted. The monitor project was published on the Kickstarter crowdfunding platform; it has already raised almost $1.7 million. In most cases, people who are not satisfied with one monitor use a combination of… Continue reading Americans have developed a clamshell monitor with two screens