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Archive for the ‘quantum physics’ category: Page 522

Feb 14, 2018

Quantum computers ‘one step closer’

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

Quantum computing has taken a step forward with the development of a programmable quantum processor made with silicon.

The team used microwave energy to align two electron particles suspended in silicon, then used them to perform a set of test calculations.

By using silicon, the scientists hope that quantum computers will be more easy to control and manufacture.

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Feb 12, 2018

Light controls two-atom quantum computation

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

Scientists have demonstrated mathematical operations with a quantum gate between two trapped atoms that is mediated by photons.

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Feb 11, 2018

Free-fall experiment could test if gravity is a quantum force

Posted by in category: quantum physics

The effort to reconcile general relativity with quantum mechanics always hits one snag: gravity. An experiment could finally tell us if it is a quantum force.

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Feb 11, 2018

We’ve figured out how to ensure quantum computers can be trusted

Posted by in categories: computing, quantum physics

Can spot quantum errors IBM research By Mark Kim What good is a fast computer if you can’t trust it? Thanks to half a century of research on getting computers to do their job correctly even in the presence of mechanical errors, our modern machines tend to be pretty reliable. Unfortunately, the laws of sheer complexity of which leaves them prone to errors. Now, we finally have the first demonstration of a quantum program that can detect data corruption.

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Feb 11, 2018

Forging a quantum leap in quantum communication

Posted by in category: quantum physics

In quantum communication, the participating parties can detect eavesdropping by resorting to the fundamental principle of quantum mechanics — a measurement affects the measured quantity. Thus, an eavesdropper can be detected by identifying traces his measurements of the communication channel leave behind. The major drawback of quantum communication is the slow speed of data transfer, limited by the speed at which the parties can perform quantum measurements. Researchers at Bar-Ilan University have devised a method that overcomes this, and enables an increase in the rate of data transfer by…

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Feb 11, 2018

‘Ultra-intense laser’ stops electrons travelling at near-light speed for first time, mimicking black holes

Posted by in categories: cosmology, quantum physics

Using a laser beam one quadrillion times brighter than the Sun, physicists have stopped electrons travelling at near-light speeds for the first time. The experiment produced a quantum mechanical phenomenon that was previously only thought to occur around black holes and quasars.

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Feb 10, 2018

Job One for Quantum Computers: Boost Artificial Intelligence

Posted by in categories: quantum physics, robotics/AI

The fusion of quantum computing and machine learning has become a booming research area. Can it possibly live up to its high expectations?

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Feb 9, 2018

First 3D imaging of excited quantum dots

Posted by in categories: biotech/medical, quantum physics, solar power, sustainability

Quantum dots are rapidly taking center stage in emerging applications and research developments, from enhanced LCD TVs and thin-film solar cells, to high-speed data transfer and fluorescent labeling in biomedical applications.

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Feb 5, 2018

Why Quantum Computers Will Be an Amazing Tool for Social Innovators — By Darlene Damm | SingularityHub

Posted by in categories: computing, quantum physics

“Eventually, as the kinks are worked out, quantum machines will have a wide impact from scientific research to business. But there’s another area that could benefit from their problem-solving prowess too: Social impact.”

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Feb 2, 2018

Generalized Hardy’s paradox shows an even stronger conflict between quantum and classical physics

Posted by in categories: particle physics, quantum physics

By building the most general framework for the n-particle Hardy’s paradox and Hardy’s inequality, the results of the new paper provide a stronger Hardy’s paradox, and can also detect more quantum entangled states. As the success probability for the three-qubit generalized Hardy’s paradox reaches 0.25, the researchers are very hopeful that it will be observed in future experiments. Credit: Jiang, et al. © 2018 American Physical Society In 1993, physicist Lucien Hardy proposed an experiment showing that there is a small probability (around 6–9%) of observing a particle and its antiparticle in…

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