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Feb 2, 2023

Researchers devise a new path toward ‘quantum light’

Posted by in categories: particle physics, quantum physics

Researchers have theorized a new mechanism to generate high-energy “quantum light,” which could be used to investigate new properties of matter at the atomic scale.

The researchers, from the University of Cambridge, along with colleagues from the U.S., Israel and Austria, developed a theory describing a new state of light, which has controllable quantum properties over a broad range of frequencies, up as high as X-ray frequencies. Their results are reported in the journal Nature Physics.

The world we observe around us can be described according to the laws of classical physics, but once we observe things at an atomic scale, the strange world of takes over. Imagine a basketball: observing it with the , the basketball behaves according to the laws of classical physics. But the atoms that make up the basketball behave according to quantum physics instead.

Feb 2, 2023

The first lab-created ‘quantum abacus’

Posted by in categories: mathematics, quantum physics

Do you want to know whether a very large integer is a prime number or not? Or if it is a “lucky number”? A new study by SISSA, carried out in collaboration with the University of Trieste and the University of Saint Andrews, suggests an innovative method that could help answer such questions through physics, using some sort of “quantum abacus.”

By combining theoretical and , scientists were able to reproduce a quantum potential with corresponding to the first 15 and the first 10 lucky numbers using holographic laser techniques. This result, published in PNAS Nexus, opens the door to obtaining potentials with finite sequences of integers as arbitrary quantum energies, and to addressing mathematical questions related to with quantum mechanical experiments.

“Every physical system is characterized by a certain set of energy levels, which basically make up its ID,” explains Giuseppe Mussardo, at SISSA—International School for Advanced Studies. “In this work, we have reversed this line of reasoning: is it possible—starting from an arithmetic sequence, for example that of prime numbers—to obtain a quantum system with those very numbers as energy levels?”

Feb 2, 2023

Unconventional superconductivity found in kagome metal

Posted by in categories: engineering, quantum physics

Physicists using advanced muon spin spectroscopy at Paul Scherrer Institute PSI found the missing link between their recent breakthrough in a kagome metal and unconventional superconductivity. The team uncovered an unconventional superconductivity that can be tuned with pressure, giving exciting potential for engineering quantum materials.

A year ago, a group of physicists led by PSI detected evidence of an unusual collective electron behavior in a kagome metal, known as time-reversal symmetry-breaking charge order—a discovery that was published in Nature.

Although this type of behavior can hint towards the highly desirable trait of , actual evidence that the material exhibited unconventional superconductivity was lacking. Now, in a new study published in Nature Communications, the team have provided key evidence to make the link between the unusual charge order they observed and unconventional superconductivity.

Feb 2, 2023

How ‘modern-day slavery’ in the Congo powers the rechargeable battery economy

Posted by in categories: economics, mobile phones, sustainability, transportation

Phone and electric car batteries are made with cobalt mined in the Democratic Republic of Congo. Cobalt Red author Siddharth Kara describes the conditions for workers as a “horror show.”

Feb 2, 2023

We Don’t Need To Go To Mars

Posted by in category: space travel

Buckle up, this one is fun: Maciej Cegowski has begun what promises to be a multi-part essay arguing against a crewed mission to Mars. It’s called “Why Not Mars,” it’s 8,000 words long, with 66 footnotes, and it sings. I’m not even sure I agree, but I enjoy the hell out of it.

The goal of this essay is to persuade you that we shouldnt send human beings to Mars, at least not anytime soon. Landing on Mars with existing technology would be a destructive, wasteful stunt whose only legacy would be to ruin the greatest natural history experiment in the Solar System. It would no more open a new era of spaceflight than a Phoenician sailor crossing the Atlantic in 500 B.C. would have opened up the New World. And it wouldnt even be that much fun.

A few choice lines:

Feb 2, 2023

Google ads push ‘virtualized’ malware made for antivirus evasion

Posted by in category: cybercrime/malcode

An ongoing Google ads malvertising campaign is spreading malware installers that leverage KoiVM virtualization technology to evade detection when installing the Formbook data stealer.

KoiVM is a plugin for the ConfuserEx. NET protector that obfuscates a program’s opcodes so that the virtual machine only understands them. Then, when launched, the virtual machine translates the opcodes back to their original form so that the application can be executed.

“Virtualization frameworks such as KoiVM obfuscate executables by replacing the original code, such as NET Common Intermediate Language (CIL) instructions, with virtualized code that only the virtualization framework understands,” explains a new report by SentinelLabs.

Feb 2, 2023

Discovery of new ice may change our understanding of water

Posted by in categories: energy, space

Researchers at UCL and the University of Cambridge have discovered a new type of ice that more closely resembles liquid water than any other known ices and that may rewrite our understanding of water and its many anomalies.

The newly discovered ice is amorphous—that is, its molecules are in a disorganized form, not neatly ordered as they are in ordinary, crystalline ice. Amorphous ice, although rare on Earth, is the main type of ice found in space. That is because in the colder environment of space, ice does not have enough thermal energy to form crystals.

For the study, published in the journal Science, the research team used a process called ball milling, vigorously shaking ordinary ice together with steel balls in a jar cooled to-200 degrees Centigrade.

Feb 2, 2023

Hackers weaponize Microsoft Visual Studio add-ins to push malware

Posted by in category: cybercrime/malcode

Security researchers warn that hackers may start using Microsoft Visual Studio Tools for Office (VSTO) more often as method to achieve persistence and execute code on a target machine via malicious Office add-ins.

The technique is an alternative to sneaking into documents VBA macros that fetch malware from an external source.

Since Microsoft announced it would block the execution of VBA and XL4 macros in Office by default, threat actors moved to archives (.ZIP,.ISO) and. LNK shortcut files to distribute their malware.

Feb 2, 2023

Over 1,800 Android phishing forms for sale on cybercrime market

Posted by in categories: cryptocurrencies, cybercrime/malcode, finance, robotics/AI

A threat actor named InTheBox is promoting on Russian cybercrime forums an inventory of 1,894 web injects (overlays of phishing windows) for stealing credentials and sensitive data from banking, cryptocurrency exchange, and e-commerce apps.

The overlays are compatible with various Android banking malware and mimic apps operated by major organizations used in dozens of countries on almost all continents.

Being available in such numbers and at low prices, allows cybercriminals to focus on other parts of their campaigns, development of the malware, and to widen their attack to other regions.

Feb 2, 2023

Water pores in leaves proven to be part of plant’s defense system against pathogens

Posted by in category: biological

How do plants defend themselves against pathogenic microorganisms? This is a complex puzzle, of which a team of biologists from the University of Amsterdam has solved a new piece. The team, led by Harrold van den Burg, discovered that while the water pores (hydathodes) in leaves provide an entry point for bacteria, they are also an active part of the defense against these invaders. The team’s research has now been published in the journal Current Biology.

Anyone who is used to giving plants plenty of water might know the phenomenon: small droplets of plant sap that sometimes appear at the edge of the leaves, especially at nighttime. When plants take up more water via their roots than they lose through evaporation, they can use their water pores on the leaf margins to release excess water. The pores literally prevent root water pressure from becoming too high. This is an important mechanism, but at the same time, risky. Pathogenic microorganisms can enter the plant’s veins through these sap droplets to colonize the water pores.

Biologists have therefore been asking themselves for a long time: How do plants defend themselves against this wide-open entry point? Are those water pores, the hydathodes, defenseless glands that allow ample entry of harmful pests? Or have they evolved in such a way that they are part of the plant’s line of defense against pathogens?