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Archive for the ‘quantum physics’ category: Page 668

Jul 30, 2018

These 9 Incredible Images Are a Mind-Boggling Remind of How Far Technology Has Come

Posted by in categories: computing, internet, mobile phones, quantum physics

Sometimes, while waiting for quantum computers to become a thing, or complaining that your stupid laptop keeps dying on 5 percent battery, it’s easy to forget just how far technology has come over the past 50 years.

Sure, we can all list off a whole bunch of innovations that have changed the way the world works — the Internet, smartphones, radio telescopes — but it’s hard to really put that kind of change into perspective.

Thankfully, pictures often speak louder than words, and so below are nine photos that’ll make you stop and raise your *praise hand* emojis to the sky in honour of the scientists and engineers that have got us where we are today.

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Jul 30, 2018

String Theory May Create Far Fewer Universes Than Thought

Posted by in category: quantum physics

Some physicists claim the popular landscape of universes in string theory may not exist.

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Jul 27, 2018

Finally, a Problem Only Quantum Computers Will Ever Be Able to Solve

Posted by in categories: computing, quantum physics

Computer scientists have been searching for years for a type of problem that a quantum computer can solve but that any possible future classical computer cannot. Now they’ve found one.

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Jul 26, 2018

Researchers Achieve New Quantum Entanglement Record

Posted by in category: quantum physics

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Jul 25, 2018

Closed Loophole Confirms the Unreality of the Quantum World

Posted by in category: quantum physics

A quickly closed loophole has proven that the “great smoky dragon” of quantum mechanics may forever elude capture.

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Jul 24, 2018

Microsoft debuts free quantum computer programming katas

Posted by in categories: computing, quantum physics

Microsoft yesterday released its new Quantum Katas, a free open source project that’ll teach you how to develop for quantum computers.

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Jul 24, 2018

Nanocrystals emit light

Posted by in categories: computing, quantum physics

Using advanced fabrication techniques, engineers at the University of California San Diego have built a nanosized device out of silver crystals that can generate light by efficiently “tunneling” electrons through a tiny barrier. The work brings plasmonics research a step closer to realizing ultra-compact light sources for high-speed, optical data processing and other on-chip applications.

The work is published July 23 in Nature Photonics.

The device emits light by a quantum mechanical phenomenon known as inelastic electron tunneling. In this process, electrons move through a solid barrier that they cannot classically cross. And while crossing, the electrons lose some of their energy, creating either photons or phonons in the process.

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Jul 23, 2018

Uncovering the interplay between two famous quantum effects

Posted by in categories: biotech/medical, computing, mobile phones, quantum physics

The Casimir force and superconductivity are two well-known quantum effects. These phenomena have been thoroughly studied separately, but what happens when these effects are combined in a single experiment? Now, Delft University of Technology have created a microchip on which two wires were placed in close proximity in order to measure the Casimir forces that act upon them when they become superconducting.

Is vacuum really empty? Quantum mechanics tells us that it’s actually swarming with particles. In the 1940s, Dutch physicists Hendrik Casimir and Dirk Polder predicted that when two objects are placed in very close proximity, about a thousandth of the diameter of a human hair, this sea of ‘vacuum particles’ pushes them together – a phenomenon known as the Casimir effect. This attractive force is present between all objects and even sets fundamental limits to how closely we can place components together on microchips.

Superconductivity is another well-known phenomenon, also discovered by a Dutchman, Heike Kamerlingh Onnes, in the early 20th century. It describes how certain materials, such as aluminum or lead, allow electricity to flow through them without any resistance at . Over the last 100 years, superconductors have revolutionized our understanding of physics and are responsible for magnetically levitated trains, MRI scans and even mobile phone stations.

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Jul 23, 2018

IBM’s Hello Quantum is a devilishly difficult puzzle game about qubits

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

IBM’s Hello Quantum released on Android today. If you’ve always wanted to be a quantum computer programmer, this is the puzzle game for you!

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Jul 23, 2018

Ytterbium: The quantum memory of tomorrow

Posted by in categories: encryption, internet, quantum physics, security

Quantum communication and cryptography are the future of high-security communication. But many challenges lie ahead before a worldwide quantum network can be set up, including propagating the quantum signal over long distances. One of the major challenges is to create memories with the capacity to store quantum information carried by light. Researchers at the University of Geneva (UNIGE), Switzerland, in partnership with CNRS, France, have discovered a new material in which an element, ytterbium, can store and protect the fragile quantum information even while operating at high frequencies. This makes ytterbium an ideal candidate for future quantum networks, where the aim is to propagate the signal over long distances by acting as repeaters. These results are published in the journal Nature Materials.

Quantum cryptography today uses optical fibre over several hundred kilometres and is marked by its high degree of security: it is impossible to copy or intercept information without making it disappear.

However, the fact that it is impossible to copy the signal also prevents scientists from amplifying it to diffuse it over long distances, as is the case with the Wi-Fi network.

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