Light leads to the quantum world and the acceleration of supercurrents. Free Technical Library News

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Light leads to the quantum world and the acceleration of supercurrents

22.05.2020

Scientists have already been able to use light waves to accelerate supercurrents and gain access to the unique properties of the quantum world, including forbidden light emissions. The scientific world believes that sometime in the future these unique technologies can be applied to high-speed quantum computers and other, more advanced technologies.

In supercurrents, scientists were able to observe an incredible phenomenon. An electric charge can move through materials without resistance and at ultra-low temperatures. This is forbidden by the usual laws of physics, such a phenomenon breaks the symmetry.

However, according to Jigang Wang, professor of physics and astronomy at the University of Iowa, it exists. For the first time, researchers have been able to use light pulses at terahertz frequencies to accelerate electron pairs known as Cooper pairs. They were passed inside the overcurrents.

At the same time, trillions of pulses could pass in one second. Scientists have determined the path that is created by pairs of electrons that were in acceleration. This method made it possible to detect light with twice the frequency of the incoming energy, which is used to accelerate the electrons.

But earlier it was always considered that terahertz terahertz radiation of the second harmonic in superconductors is impossible. And in fact it is not. The researchers used terahertz laser flashes as a piece of control to accelerate supercurrents and access new and potentially useful quantum states of matter. Forbidden light was able to give scientists access to an exotic class of quantum phenomena - energy and particles on the small scale of atoms.

It was possible to achieve such results thanks to the use of a special tool called quantum terahertz spectroscopy. Its peculiarity lies in the ability to visualize and direct electrons. The scientists argue that access to this and other quantum phenomena could help spur major innovation.

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Paintings on demand 16.12.2003

The British National Gallery has 2300 paintings by great artists of the past in its collection. Museum workers intend to trade these treasures. Not originals, of course, but superbly executed digital copies.

Using equipment provided by Hewlett-Packard, the paintings are scanned and digitized. If the best amateur digital cameras produce images consisting of 5-6 million dots, then the technology installed in the gallery allows you to copy pictures with a resolution of 100 million dots.

Copies are sold in the souvenir shop at the museum. You order a painting from the catalog, choose the size (so far only the formats are from 21 by 30 to 42 by 60 centimeters) and in five minutes you will receive a copy. The cost of a copy is from 10 to 25 pounds. It is made on a high-quality color printer, and the colors are guaranteed not to fade for at least 70 years. Since autumn, visitors have been offered a choice of about a thousand paintings, but by the end of the year, all exhibits in the collection should be scanned.

The gallery's management is considering the possibility of licensing the printing of their paintings to printing companies in other cities and countries - they will receive the paintings via the Internet.

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