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Archive for the ‘quantum physics’ category: Page 792

Nov 17, 2015

Quantum Super Computer Detects and Self-corrects its Errors

Posted by in categories: computing, quantum physics

A team of quantum physicists in Martinis Lab have come a step closer in creating the circuitry that would allow them to process super computing done by quantum computers. The revolution is promised by the new quantum bits (qubits) compared to the previously done classical computing. Qubits infuse the system with high levels of reliability and speed, thus building foundations for large scale superconducting quantum computers.

Till now computing has been done by classical methods in which the bits were either in states 0 or 1, but qubits exist at all the positions simultaneously, in different dimensions. This special property of being omnipresent is called ‘superpositioning’. However, one of the difficulties is keeping the qubits stable to reproduce same result each time. This superpositioning characteristic makes qubits prone to ‘flipping’, therefore making it difficult to work with.

Julian Kelly, graduate student researcher and co-lead author of a research paper that was published in the journal Nature said:

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Nov 16, 2015

The quantum source of space-time

Posted by in category: quantum physics

Many physicists believe that entanglement is the essence of quantum weirdness — and some now suspect that it may also be the essence of space-time geometry.

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Nov 15, 2015

Maybe the Whole Universe Won’t Suddenly Collapse Into an Uninhabitable Void

Posted by in category: quantum physics

A new study offers some reassurance.

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Nov 13, 2015

Google researcher: Quantum computers aren’t perfect for deep learning

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

In the past couple of years, Google has been trying to improve more and more of its services with artificial intelligence. Google also happens to own a quantum computer — a system capable of performing certain computations faster than classical computers.

It would be reasonable to think that Google would try running AI workloads on the quantum computer it got from startup D-Wave, which is kept at NASA’s Ames Research Center in Mountain View, California, right near Google headquarters.

Google is keen on advancing its capabilities in a type of AI called deep learning, which involves training artificial neural networks on a large supply of data and then getting them to make inferences about new data.

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Nov 13, 2015

Google reportedly planning a ‘watershed’ quantum computing announcement for December 8

Posted by in categories: computing, quantum physics, security

Interesting…


According to Steve Jurvetson, venture capitalist and board member at pioneer quantum computing company D-WAVE (as well as others, such as Tesla and SpaceX), Google has what may be a “watershed” quantum computing announcement scheduled for early next month. This comes as D-WAVE, which notably also holds the Mountain View company as a customer, has just sold a 1000+ Qubit 2X quantum computer to national security research institution Los Alamos…

It’s not exactly clear what this announcement will be (besides important for the future of computing), but Jurvetson says to “stay tuned” for more information coming on December 8th. This is the first we’ve heard of a December 8th date for a Google announcement, and considering its purported potential to be a turning point in computing, this could perhaps mean an actual event is in the cards.

Continue reading “Google reportedly planning a ‘watershed’ quantum computing announcement for December 8” »

Nov 13, 2015

Physicists put the arrow of time under a quantum microscope

Posted by in category: quantum physics

Entropy caused by quantum fluctuations measured at the molecular level.

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Nov 11, 2015

A New Way of Thinking About Spacetime That Turns Everything Inside Out

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

One of the weirdest aspects of quantum mechanics is entanglement, because two entangled particles affecting each other across vast distances seems to violate a fundamental principle of physics called locality: things that happen at a particular point in space can only influence the points closest to it. But what if locality — and space itself — is not so fundamental after all? Author George Musser explores the implications in his new book, Spooky Action At a Distance.

When the philosopher Jenann Ismael was ten years old, her father, an Iraqi-born professor at the University of Calgary, bought a big wooden cabinet at an auction. Rummaging through it, she came across an old kaleidoscope, and she was entranced. For hours she experimented with it and figured out how it worked. “I didn’t tell my sister when I found it, because I was scared she’d want it,” she recalls.

As you peer into a kaleidoscope and turn the tube, multicolored shapes begin to blossom, spin and merge, shifting unpredictably in seeming defiance of rational explanation, almost as if they were exerting spooky action at a distance on one another. But the more you marvel at them, the more regularity you notice in their motion. Shapes on opposite sides of your visual field change in unison, and their symmetry clues you in to what’s really going on: those shapes aren’t physical objects, but images of objects — of shards of glass that are jiggling around inside a mirrored tube.

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Nov 8, 2015

Theory of a Mach Effect Thruster II

Posted by in categories: energy, information science, quantum physics, space travel

ABSTRACT

According to Einstein, General Relativity contains the essence of Mach’s ideas. Mach’s principle can be summarized by stating that the inertia of a body is determined by the rest of the mass-energy content of the universe. Inertia here arises from mass-energy there. The latter, was a statement made by John Wheeler in his 1995 book, Gravitation and Inertia, coauthored by Ciufolini. Einstein believed that to be fully Machian, gravity would need a radiative component, an action-at-a-dis- tance character, so that gravitational influences on a body from far away could be felt immediately. In 1960’s, Hoyle and Narlikar (HN) developed such a theory which was a gravitational version of the Absorber theory derived by Wheeler-Feynman for classical electrodynamics and later expanded upon by Davies and Narlikar for quantum electrodynamics. The HN-field equation has the same type of mass fluctuation terms as in the Woodward Mach effect thruster theory. The force equation, used to predict the thrust in our device, can be derived from the mass fluctuation. We outline a new method for deriving the force equation. We present new experimental tests of the thruster to show that the thrust seen in our device is not due to either heating or Dean Drive effects. Successful replications have been performed by groups in Austria and Canada, but their work is still pending in the peer review literature.

Keywords:

Mach Effect Drive, Transient Mass Fluctuations, Mach’s Principle, Action at a Distance, Advanced Waves, Event Horizon.

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Nov 6, 2015

Researchers take two big steps toward quantum computing

Posted by in categories: computing, encryption, quantum physics

(Phys.org)—” Spooky action at a distance,” Einstein’s famous, dismissive characterization of quantum entanglement, has long been established as a physical phenomenon, and researchers are keen to develop practical applications for entanglement including communication, encryption, and computing.

Quantum entanglement is a phenomenon in which the production or the interactions of a number of particles cannot be described independently of each other, and must instead be described in terms of the whole system’s quantum state.

Two recent experiments with entanglement have been reported in the Proceedings of the National Academy of Sciences, one proving that in photons can be preserved even in turbulent atmospheric conditions; the other demonstrating entanglement swapping between qubits over the 143 kilometers between the Canary Islands and Tenerife.

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Nov 4, 2015

Relativity v quantum mechanics – the battle for the universe

Posted by in category: quantum physics

Physicists have spent decades trying to reconcile two very different theories. But is a winner about to emerge – and transform our understanding of everything from time to gravity?

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