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Category: computing – Page 508

Google hails ‘key milestone’ in quantum computing

Google scientists said Wednesday they have passed a major milestone in their quest to develop effective quantum computing, with a new study showing they reduced the rate of errors—long an obstacle for the much-hyped technology.

Quantum computing has been touted as a revolutionary advance that uses our growing scientific understanding of the subatomic world to create a machine with powers far beyond those of today’s conventional computers.

However the technology remains largely theoretical, with many thorny problems still standing in the way—including stubbornly high error rates.

New material may offer key to solving quantum computing issue

A new form of heterostructure of layered two-dimensional (2D) materials may enable quantum computing to overcome key barriers to its widespread application, according to an international team of researchers.

The researchers were led by a team that is part of the Penn State Center for Nanoscale Science (CNS), one of 19 Materials Research Science and Engineering Centers (MRSEC) in the United States funded by the National Science Foundation. Their work was published Feb. 13 in Nature Materials.

A regular computer consists of billions of transistors, known as bits, and are governed by binary code (“0” = off and “1” = on). A , also known as a qubit, is based on and can be both a “0” and a “1” at the same time. This is known as superposition and can enable quantum computers to be more powerful than the regular, classical computers.

New testing approach diagnoses COVID-19 with near-perfect accuracy

Most existing COVID-19 tests “rely on the same principle, which is that you have accumulated a detectable amount of viral material, for example, in your nose,” says study lead author Frank Zhang, who worked on the project as a Flatiron research fellow at the Flatiron Institute’s Center for Computational Biology (CCB) in New York City. “That poses a challenge when it’s early in the infection time window and you haven’t accumulated a lot of viral material, or you’re asymptomatic.”

The new technique is instead based on how our bodies mount an when invaded by SARS-CoV-2, the virus that causes COVID-19. When the assault starts, specific genes turn on. Segments of those genes produce mRNA molecules that guide the building of proteins. The particular blend of those mRNA molecules changes the types of proteins produced, including proteins involved in virus-fighting functions. The new method can confidently identify when the body is mounting an immune response to the COVID-19 virus by measuring the relative abundance of the various mRNA molecules. The new study is the first to use such an approach to diagnose an infectious disease.

Researchers discover new quantum state in a quirky material

It can boost conductivity by a billion percent.

A collaboration of physicists working at different institutes in the U.S. have discovered a new quantum state in an alloy made of magnesium, silicon, and tellurium, a press release said. The finding could result in applications in quantum computing, such as building sensors and communication systems.

Electrons can move around freely inside the structure.

Vchal/istock.

The alloy is a crystalline structure denoted as Mn3Si2Te6 and consists of octagonal cells placed in a honeycomb-like arrangement when viewed from above. Though, when viewed from the side, it consists of stacked sheets.

New thermal management technology for electronic devices reduces bulk while improving cooling

Electronic devices generate heat, and that heat must be dissipated. If it isn’t, the high temperatures can compromise device function, or even damage the devices and their surroundings.

Now, a team from UIUC and UC Berkeley have published a paper in Nature Electronics detailing a new cooling method that offers a host of benefits, not the least of which is space efficiency that offers a substantial increase over conventional approaches in devices’ power per unit volume.

Tarek Gebrael, the lead author and a PhD student in mechanical engineering, explains that the existing solutions suffer from three shortcomings. “First, they can be expensive and difficult to scale up,” he says. Heat spreaders made of diamond, for example, are sometimes used at the chip level, but they aren’t cheap.

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