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Archive for the ‘quantum physics’ category: Page 322

Mar 12, 2021

A new approach to directly testing quantum gravity

Posted by in category: quantum physics

Scientists have been trying to come up with a theory of quantum gravity for 100 years.


A team of physicists has proposed a clever plan to concoct a quantum theory of gravity: refine an age-old technique, and use it to probe the tiniest scales in the universe.

Mar 12, 2021

H.A.L.O. AI Completes XPRIZE Competition as Finalist with Groundbreaking Unification of Quantum Mechanics and Relativity

Posted by in categories: biotech/medical, quantum physics, robotics/AI

P.e.a.c.e!nc. is proud to announce the conclusion as finalists in the $500k Pandemic Response Challenge sponsored by Cognizant with Landmark AI Experiment.

Mar 11, 2021

Quantum computing: Honeywell just quadrupled the power of its computer

Posted by in categories: computing, quantum physics

Honeywell’s H1 quantum system has reached a record-high quantum volume.

Mar 11, 2021

Quantum Mischief Rewrites the Laws of Cause and Effect

Posted by in category: quantum physics

Spurred on by quantum experiments that scramble the ordering of causes and their effects, some physicists are figuring out how to abandon causality altogether.

Mar 11, 2021

Quantum Mechanics, the Chinese Room Experiment and the Limits of Understanding

Posted by in category: quantum physics

All of us, even physicists, often process information without really knowing what we’re doing.

Mar 10, 2021

Physicists Measure the Gravitational Force between the Smallest Masses Yet

Posted by in categories: computing, particle physics, quantum physics

But Aspelmeyer and his colleagues could not declare victory quite yet: they still had to rule out the possibility that the source mass modulation was generating other forces on the test mass that would oscillate at precisely the same frequency. Periodic rocking of the table supporting the experimental apparatus, caused by recoil from the barely visible motion of the source mass, was just one of a host of confounders the researchers had to carefully quantify. In the end, they found that all known nongravitational forces would be at least 10 times smaller than the gravitational interaction.

Reaching toward Quantum Scales

Aspelmeyer believes that an improved torsion pendulum will be sensitive to gravity from masses 5000 times smaller still—lighter than a single eyelash. His ultimate goal is to experimentally test the quantum nature of gravity, a question that has perplexed physicists for nearly a century. Quantum mechanics is one of the most successful and precisely tested theories in all of science: it describes everything from the behavior of subatomic particles to the semiconductor physics that makes modern computing possible. But attempts to develop a quantum theory of gravity have repeatedly been stymied by contradictory and nonsensical predictions.

Mar 10, 2021

Four new particles have been discovered, expanding our knowledge of the quantum universe!

Posted by in categories: particle physics, quantum physics

Mar 10, 2021

Honeywell Commercial Quantum Computer Hits 512 Quantum Volume

Posted by in categories: computing, quantum physics

On track to hit the hundreds of thousands that they projected for 2025?


Honeywell has upgraded the commercial trapped ion quantum computer System Model H1 and achieved a quantum volume of 512. This is four times higher than when it was released in September 2020 with a quantum volume of 128. This is the highest measured on a commercial quantum computer to date. It is the third time in nine months Honeywell has set a record for quantum volume on one of its systems.

Mar 9, 2021

Key step reached to­ward long-​sought goal of a silicon-​based laser

Posted by in categories: chemistry, computing, quantum physics

When it comes to microelectronics, there is one chemical element like no other: silicon, the workhorse of the transistor technology that drives our information society. The countless electronic devices we use in everyday life are a testament to how today very high volumes of silicon-based components can be produced at very low cost. It seems natural, then, to use silicon also in other areas where the properties of semiconductors—as silicon is one—are exploited technologically, and to explore ways to integrate different functionalities. Of particular interest in this context are diode lasers, such as those employed in barcode scanners or laser pointers, which are typically based on gallium arsenide (GaAs). Unfortunately though, the physical processes that create light in GaAs do not work so well in silicon. It therefore remains an outstanding, and long-standing, goal to find an alternative route to realizing a ‘laser on silicon.’

Writing today in Applied Physics Letters, an international team led by Professors Giacomo Scalari and Jérôme Faist from the Institute for Quantum Electronics present an important step towards such a device. They report electroluminescence—electrical light generation—from a based on silicon-germanium (SiGe), a material that is compatible with standard fabrication processes used for silicon devices. Moreover, the emission they observed is in the terahertz frequency band, which sits between those of microwave electronics and infrared optics, and is of high current interest with a view to a variety of applications.

Mar 8, 2021

China Plans to Defeat US Supremacy in AI, Quantum Computing With Five-Year Plan

Posted by in categories: government, quantum physics, robotics/AI

Another call for the US government to declare a National Initiative for the USA to reach AGI by 2025.

“China Plans to Defeat US Supremacy in AI, Quantum Computing With Five-Year Plan”


Huawei and ZTE would lead the country in battling tech with tech!

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