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Category: quantum physics – Page 1,007

Quantum computing breakthrough paves way for ultra-powerful machines

A crucial hurdle in the development of ultra-powerful quantum computers has been overcome through the development of the world’s first programmable system that can be scaled.

Researchers at the University of Maryland College Park built a quantum computer module that can be linked to other modules to perform simultaneous quantum algorithms.

“Quantum computers can solve certain problems more efficiently than any possible conventional computer,” states a paper published this week that details the researchers’ findings. “Small quantum algorithms have been demonstrated in multiple quantum computing platforms, many specifically tailored to hardware to implement a particular algorithm or execute a limited number of computational paths.

New quantum computer device takes advantage of a loophole in causality

Researchers in Finland have figured out a way to reliably make quantum computers — technology that’s tipped to revolutionise computing in the coming years — even more powerful. And all they had to do was throw common sense out the window.

You’re almost certainly reading this article on a classical computer — which includes all phones, laptops, and tablets — meaning that your computer can only ever do one thing at a time. It reads one bit, then the next bit, then the next bit, and so on. The reading is lightning fast and combines millions or billions or trillions of bits to give you what you want, but the bits are always read and used in order.

So if your computer searches for the solution to a problem, it tries one answer (a particular batch of ones and zeros), checks how far the result is from the goal, tries another answer (a different batch), and repeats. For complicated problems, that process can take an incredibly long time. Sometimes, that’s good. Very clever multiplication secures your bank account, and faster or more efficient equation-solvers put that in jeopardy.

New Physics Research Findings Reported from Hitachi (Quasi-Adiabatic Quantum Computing Treated with c-Numbers Using the Local-Field Response)

More insights on a more controlled Quantum.

By a News Reporter-Staff News Editor at Physics Week — New research on Physics Research is the subject of a report. According to news reporting from Tokyo, Japan, by VerticalNews editors, the research stated, “A computational method called the local-field response method is proposed, where spins evolve by responding to an effective field consisting of gradually decreasing external fields and spin-spin interactions, similarly to what is carried out in adiabatic quantum computing (AQC). This method is partly quantum-mechanical.”

Rapid Superconducting Memory Cell Control System Developed

“With the operational function that we have proposed in these memory cells, there will be no need for time-consuming magnetization and demagnetization processes. This means that read and write operations will take only a few hundred picoseconds, depending on the materials and the geometry of the particular system, while conventional methods take hundreds or thousands of times longer than this,” said the study author Alexander Golubov, the head of Moscow Institute of Physics and Technology (MIPT)’s Laboratory of Quantum Topological Phenomena in Superconducting Systems.

Golubov and colleagues at Moscow State University have proposed creating basic memory cells based on quantum effects in superconductor “sandwiches.” Superconductors were predicted in the 1960s by the British physicist Brian Josephson. The electrons in these “sandwiches,” called “Josephson junctions,” are able to tunnel from one layer of a superconductor to another, passing through the dielectric like balls passing through a perforated wall.

Today, Josephson junctions are used both in quantum devices and conventional devices. For example, superconducting qubits are used to build the D-wave quantum system, which is capable of finding the minima of complex functions using the quantum annealing algorithm. There are also ultra-fast analogue-to-digital converters, devices to detect consecutive events, and other systems that do not require fast access to large amounts of memory. There have also been attempts to use the Josephson Effect to create ordinary processors. An experimental processor of this type was created in Japan in the late 1980s. In 2014, the research agency IAPRA resumed its attempts to create a prototype of a superconducting computer.

There’s No Cloning in Quantum Mechanics, So the Star Trek Transporter Really Is a Suicide Box

Yesterday, a report came from a tech company in Asia that they are proposing to do Quantum teleporting on humans. So, we have that camp; today we have the other camp with this article stating to do so means death. Personally, I have my doubts around humans or animals of any sort being able to teleport like Star Trek; great concept. However, to do so means breaking down your make up into particles and hopefully without killing you, the particles transport and reassemble themselves and everything remains healthy and functioning. Wish the test subjects all the best.

Remember last week’s video about the trouble with Star Trek’s transporter (a.k.a. a “suicide box”) by CGP Grey, delving into whether the teleported version of yourself would really be, well, you? Henry Reich of Minute Physics has posted a video response with his own resolution to the logical paradox.

You know what means… NERD FIGHT!

Okay, not really. They agree on many of the particulars. But the original video didn’t cover one important element to the problem of teleportation: the no-cloning theorem of quantum mechanics. As Reich explains:

AI is not as remarkable as it sounds

Let’s step back and consider the broader digital technology landscape for one moment. We have built our past, current, and new technology off of a digital foundation with machine language of standard not very complex algorithms that processes 0s & 1s which has been around since the 50’s. So, not too shock by this article; in fact we may not see a major leap in Humanoid Robots possibly until Quantum hits the mainstream. Quantum holds a lot of promise; however, it’s still too early to know for sure.

Artificial intelligence may be coming to your IT department sooner than you think, but not the way you might imagine.

This new discovery could put quantum computers within closer reach

Maybe someone saw the article on the team in Australia who solved this issue last month; glad folks are collaborating more in this space because we all win when we do.

One of the obstacles that have kept quantum computers on the distant horizon is the fact that quantum bits — the building blocks with which they’re made — are prone to magnetic disturbances. Such “noise” can interfere with the work qubits do, but on Wednesday, scientists announced a new discovery that could help solve the problem.

Specifically, by tapping the same principle that allows atomic clocks to stay accurate, researchers at Florida State University’s National High Magnetic Field Laboratory (MagLab) have found a way to give qubits the equivalent of a pair of noise-canceling headphones.

The approach relies on what are known as atomic clock transitions. Working with carefully designed tungsten oxide molecules that contained a single magnetic holmium ion, the MagLab team was able to keep a holmium qubit working coherently for 8.4 microseconds -– potentially long enough for it to perform useful computational tasks.

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