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Archive for the ‘quantum physics’ category: Page 580

Mar 20, 2020

Elusive Higgs Mode Created in Exotic Materials

Posted by in categories: particle physics, quantum physics

Two teams of physicists have created the “Higgs mode” – a link between particle physics and the physics of matter. The work could help researchers understand the strange behavior of deeply quantum systems.

Mar 20, 2020

Why Intel Is Investing In Neuromorphic Computing

Posted by in categories: computing, quantum physics

The neuromorphic approach is still in deep research, and is being investigated by Intel, IBM, HPE, MIT, Purdue, Stanford and others. It will likely be deployed in production solutions within the next three to five years. Like quantum computing, there is potential for a future solution than could be 1,000–10,000 times more efficient than the digital processing approach that is currently in vogue. But also like quantum, neuromorphic computing will require a lot of research to reach fruition. When it does, it will likely only be applied to a specific set of challenges. I will continue to watch with interest.


Analyst Karl Freund takes a look at Intel’s recent announcements in the realm of neuromorphic computing.

Mar 19, 2020

Scientists create quantum sensor that covers entire radio frequency spectrum

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

A quantum sensor could give Soldiers a way to detect communication signals over the entire radio frequency spectrum, from 0 to 100 GHz, said researchers from the Army.

Such wide spectral coverage by a single antenna is impossible with a traditional receiver system, and would require multiple systems of individual antennas, amplifiers and other components.

In 2018, Army scientists were the first in the world to create a quantum receiver that uses highly excited, super-sensitive atoms—known as Rydberg atoms—to detect communications signals, said David Meyer, a scientist at the U.S. Army Combat Capabilities Development Command’s Army Research Laboratory. The researchers calculated the receiver’s channel capacity, or rate of data transmission, based on , and then achieved that performance experimentally in their lab—improving on other groups’ results by orders of magnitude, Meyer said.

Mar 19, 2020

The imitation game: Scientists describe and emulate new quantum state of entangled photons

Posted by in categories: computing, engineering, information science, nanotechnology, quantum physics

:oooo.


A research team from ITMO University, with the help of colleagues from MIPT (Russia) and Politecnico di Torino (Italy), has predicted a novel type of topological quantum state of two photons. Scientists have also applied a new, affordable experimental method for testing this prediction. The method relies on an analogy: Instead of expensive experiments with quantum systems of two or more entangled photons, the researchers have used resonant electric circuits of higher dimensionality described by similar equations. The obtained results can be useful for the engineering of optical chips and quantum computers without the need for expensive experiments. The research was published in Nature Communications.

Light plays a key role in modern information technologies: With its help, information is transmitted over large distances via optical fibers. In the future, scientists anticipate the invention of optical chips and computers that process information with the help of photons—light quanta—instead of electrons, as it is done today. This will decrease energy consumption, while also increasing the capabilities of computers. However, to turn these predictions into reality, fundamental and applied research of light behavior at the micro- and nanoscale is needed.

Continue reading “The imitation game: Scientists describe and emulate new quantum state of entangled photons” »

Mar 19, 2020

2,000 Atoms Exist in Two Places at Once in Unprecedented Quantum Experiment

Posted by in categories: particle physics, quantum physics

:oooo.


The new experiment demonstrated a bizarre quantum effect from the double-slit experiment at an unprecedented scale.

Mar 19, 2020

Model simulator helps researchers map complex physics phenomena

Posted by in categories: particle physics, quantum physics

To understand the behavior of quantum particles, imagine a pinball game—but rather than one metal ball, there are billions or more, all ricocheting off each other and their surroundings.

Physicists have long tried to study this interactive system of strongly correlated particles, which could help illuminate elusive phenomena like and magnetism.

One classic method is to create a simplified model that can capture the essence of these particle interactions. In 1963, physicists Martin Gutzwiller, Junjiro Kanamori and John Hubbard—working separately—proposed what came to be called the Hubbard model, which describes the essential physics of many interacting quantum particles. The solution to the model, however, only exists in one dimension. For decades, physicists have tried to realize the Hubbard model in two or three dimensions by creating that can mimic it.

Mar 18, 2020

Russia’s Kilo-Class Submarines: “Black Holes” No Navy Wants to Fight

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

I think these can be fought with current technology such as quantum radar even other higher level technology. It can also be hacked with quantum radar or neutrino beams.


Know colloquially as the “Black Holes” by the U.S. Navy, the Improved-Kilo-class of submarines are quite deadly — and could turn the balance of power in the South China Sea in China’s favor.

Mar 18, 2020

Russian Scientists Break Google’s Quantum Algorithm

Posted by in categories: cybercrime/malcode, information science, quantum physics

Clause density is something new to me but seems interesting as I know shores algorithm is the only thing that can hack systems.


Google is racing to develop quantum-enhanced processors that utilize quantum mechanical effects to one day dramatically increase the speed at which data can be processed.

In the near term, Google has devised new quantum-enhanced algorithms that operate in the presence of realistic noise. The so-called quantum approximate optimization algorithm, or QAOA for short, is the cornerstone of a modern drive towards noise-tolerant quantum-enhanced algorithm development.

Continue reading “Russian Scientists Break Google’s Quantum Algorithm” »

Mar 18, 2020

Proximity-induced superconducting gap in the quantum spin Hall edge state of monolayer WTe2

Posted by in categories: materials, quantum physics

:ooooooo.


The quantum spin Hall insulator is characterized by a bandgap in the two-dimensional (2D) interior and helical 1D edge states1,2,3. Inducing superconductivity in the helical edge state results in a 1D topological superconductor, a highly sought-after state of matter at the core of many proposals for topological quantum computing4. In the present study, we report the coexistence of superconductivity and the quantum spin Hall edge state in a van der Waals heterostructure, by placing a monolayer of 1T′-WTe2, a quantum spin Hall insulator1,2,3, on a van der Waals superconductor, NbSe2. Using scanning tunnelling microscopy and spectroscopy (STM/STS), we demonstrate that the WTe2 monolayer exhibits a proximity-induced superconducting gap due to the underlying superconductor and that the spectroscopic features of the quantum spin Hall edge state remain intact. Taken together, these observations provide conclusive evidence for proximity-induced superconductivity in the quantum spin Hall edge state in WTe2, a crucial step towards realizing 1D topological superconductivity and Majorana bound states in this van der Waals material platform.

Mar 17, 2020

Researchers set benchmark to determine achievement of quantum computing

Posted by in categories: chemistry, quantum physics, supercomputing

The race toward the first practical quantum computer is in full stride. Companies, countries, collaborators, and competitors worldwide are vying for quantum supremacy. Google says it’s already there. But what does that mean? How will the world know when it’s been achieved?

Using , at PNNL have set a mark that a quantum system would need to surpass to establish quantum supremacy in the realm of chemistry.

That’s because the fastest classical computers available today are getting better and better at simulating what a quantum computer will eventually be expected to do. To prove itself in the real world, a quantum computer will need to be able to outdo what a fast supercomputer can do. And that’s where the PNNL-led team have set a benchmark for quantum computers to beat.