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Dec 18, 2023

Scientists measure entanglement at the LHC

Posted by in categories: particle physics, quantum physics

Quantum entanglement is the most distinctive signature of quantum mechanics, says Juan R. Muñoz de Nova, a condensed-matter physicist at the Complutense University of Madrid. “It contradicts the intuitions we have on a daily basis,” he says. “That is why entanglement is so intrinsic to quantum mechanics.”

This phenomenon has been observed by researchers around the world, and the 2022 Nobel Prize in physics was awarded to three scientists for experimentally advancing our understanding of it. Scientists have detected quantum entanglement through experiments involving macroscopic diamonds and ultracold gases.

In September 2023, the ATLAS collaboration made another advancement when they unveiled the highest-energy measurement of quantum entanglement ever, using top quarks produced in the Large Hadron Collider at CERN. Interestingly, the measurement turned out a bit differently than expected.

Dec 18, 2023

Mystery of the quantum lentils: Are legumes exchanging secret signals?

Posted by in category: quantum physics

For 100 years, we have puzzled over the purpose of biophotons, low-level radiation emitted by all plants. Precision studies of lentils now hint that it could be a form of quantum communication.

By Thomas Lewton

Dec 18, 2023

Chinese robot clones pigs with no human help

Posted by in categories: biotech/medical, economics, food, robotics/AI

A robot that automates a common technique for animal cloning has been used to produce a litter of cloned pigs in China — with a much higher success rate than human scientists.

The challenge: China is both the world’s biggest producer of pork and its largest consumer, so having ideal breeding stock — animals that birthe large litters of quick-growing piglets — is important for the nation’s economy and food security.

However, in 2018 and 2019, an epidemic of deadly African swine fever wiped out almost 50% of China’s pig population. As a result, many farmers have had to import breeding pigs, and China is now eager for its pork industry to become almost entirely self-sufficient.

Dec 18, 2023

Quantum Teleportation Enters the Real World

Posted by in category: quantum physics

Two separate teams of scientists have taken quantum teleportation from the lab into the real world. Researchers working in Calgary, Canada and Hefei, China, used existing fiber optics networks to transmit small units of information across cities via quantum entanglement — Einstein’s “spooky action at a distance.”

According to quantum mechanics, some objects, like photons or electrons, can be entangled. This means that no matter how far apart they are, what happens to one will affect the other instantaneously. To Einstein, this seemed ridiculous, because it entailed information moving faster than the speed of light, something he deemed impossible. But, numerous experiments have shown that entanglement does indeed exist.

The challenge was putting it to use. A few experiments in the lab had previously managed to send information using quantum entanglement. But translating their efforts to the real world, where any number of factors could confound the process is a much more difficult challenge.

Dec 18, 2023

Raytheon to create DARPA’s airborne “wireless internet for energy”

Posted by in categories: internet, robotics/AI

DARPA has tapped Raytheon to design and develop a wireless, airborne relay system to “deliver energy into contested environments,” as part of its Energy Web Dominance program, in which DARPA wants to be able to power anything from nearly anywhere.

Under a two-year, US$10 million DARPA contract, Raytheon will create a Persistent Optical Wireless Energy Relay (POWER) system, using a series of high altitude unmanned aircraft equipped with laser-based power receiving and transmitting capabilities. Energy will be beamed up to high altitude, then relayed across however many jumps are necessary to reach the target area.

That target might be on the ground, or it might itself be another autonomous aerial platform, in which case it could stay airborne as long as necessary, its batteries being constantly charged from afar.

Dec 18, 2023

Jeff Bezos plays down AI dangers and says one trillion humans could live in huge cylindrical space stations

Posted by in categories: robotics/AI, space

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Artificial intelligence is more likely to save humanity than to destroy it, Jeff Bezos said recently. The billionaire also said he would like to see the human population grow to one trillion, with most people living in huge cylindrical space stations.

In an interview with podcaster Lex Fridman, the Amazon AMZN, +1.73% founder and former CEO rejected the idea that humans should colonize other planets, saying he believes building space colonies is the only way to achieve such population growth.

Continue reading “Jeff Bezos plays down AI dangers and says one trillion humans could live in huge cylindrical space stations” »

Dec 18, 2023

NASA’s Space Station Laser Comm Terminal Achieves First Link

Posted by in category: space

A NASA technology experiment on the International Space Station completed its first laser link with an in-orbit laser relay system on Dec. 5, 2023. Together, they complete NASA’s first two-way, end-to-end laser relay system.

NASA’s LCRD (Laser Communications Relay Demonstration) and the new space station demonstration, ILLUMA-T (Integrated LCRD Low Earth Orbit User Modem and Amplifier Terminal), successfully exchanged data for the first time. LCRD and ILLUMA-T are demonstrating how a user mission, in this case the space station, can benefit from a laser communications relay located in geosynchronous orbit.

Dec 18, 2023

China launches large classified optical satellite towards geostationary orbit

Posted by in category: satellites

HELSINKI — China sent the classified Yaogan-41 optical satellite towards the geostationary belt Friday using the country’s largest launch vehicle.

The sixth Long March 5 rocket lifted off from the coastal Wenchang Satellite Launch Center at 8:41 a.m. Eastern (1341 UTC) Dec. 15. The China Aerospace Science and Technology Corp. (CASC) announced launch success around an hour later.

Continue reading “China launches large classified optical satellite towards geostationary orbit” »

Dec 18, 2023

Electron returns to flight with successful launch of Japanese radar imaging satellite

Posted by in category: satellites

WASHINGTON — Rocket Lab successfully launched a Japanese radar imaging satellite on the first flight of its Electron rocket since a failure nearly three months ago.

The Electron rocket lifted off from the company’s Launch Complex 1 in New Zealand at 11:05 p.m. Eastern Dec. 14. The vehicle deployed its payload, the QPS-SAR-5 or Tsukuyomi-1 satellite for Japanese company iQPS, nearly 57 minutes after liftoff into a 575-kilometer orbit.

The launch was the first for Electron since a Sept. 19 failure during a launch of another radar imaging satellite for Capella Space. On that mission, the first stage performed as expected but the engine of the second stage appeared to shut down immediately after ignition, preventing it from reaching orbit.

Dec 18, 2023

Why Humidity Doesn’t Affect Drying Paint

Posted by in categories: biotech/medical, chemistry

Experiments verify a theory that explains why paint doesn’t dry any faster on a dry day than on a wet day.

You might think that polymer solutions like paint dry more slowly on a humid day than on a dry day. But researchers have now verified a theory that explains why the evaporation rate of the water or another solvent in a polymer solution can be independent of the ambient humidity [1]. The experiments show that, as predicted, water evaporation drives the polymer molecules toward the surface, where they form a dense layer that hinders evaporation and shields the surface from humidity effects. This phenomenon may affect the rate at which virus-containing respiratory droplets evaporate and thus could help explain the seasonal dependence of viral infections.

Humidity-independent evaporation is an advantage in many situations. For example, to preserve the body’s hydration, human skin maintains a nearly constant evaporation rate thanks to cell membranes whose lipid molecules can be reconfigured to adjust the sweat evaporation rate. This reconfiguration is an example of an active process. In 2017, Jean-Baptiste Salmon, a chemical engineer at the University of Bordeaux in France, proposed that humidity-independent evaporation does not require an active response [2]. Instead, his theory suggested that it occurs whenever the solvent evaporates from a solution of large molecules, a process that was already known to draw those molecules toward the drying interface. He predicted that, after the large molecules form a dense layer, the solvent’s evaporation rate will remain unchanged whether the surroundings are bone dry or at 100% humidity. However, the theory has not been tested with a nonactive polymer solution.