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Archive for the ‘quantum physics’ category

Jul 10, 2017

Basic Assumptions of Physics Might Require the Future to Influence the Past

Posted by in categories: neuroscience, quantum physics

One of the most well-accepted physical theories makes no logical sense. Quantum mechanics, the theory that governs the smallest possible spaces, forces our human brains to accept some really wacky, uncomfortable realities. Maybe we live in a world where certain observations can force our universe to branch into multiple ones. Or maybe actions in the present influence things earlier in time.

A team of physicists did some thinking, and realized this latter idea, called retrocausality, is a consequence of certain interpretations of quantum mechanics, and therefore, certain interpretations of the nature of reality. Their new paper is more of a “what-if,” an initial look at how to make some of those quantum mechanical interpretations work. Some people I asked thought the work was important, some thought it didn’t matter. Others felt the authors’ interpretation of quantum mechanics avoids the problems posed by the new paper. But no matter what, quantum mechanics will force us to make some uncomfortable conclusions about the world.

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Jul 5, 2017

Reality check: The hidden connections behind quantum weirdness

Posted by in categories: government, quantum physics

Quantum theory says that stuff doesn’t exist when we’re not looking at it. But weirder-than-weird experiments are resurrecting a long-derided alternative.

By Anil Ananthaswamy

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Jun 27, 2017

If EMdrive is real and scales with Q factor then we get almost Star Trek level Technology

Posted by in categories: quantum physics, space travel

Adam Crowl considers spaceships if EM-Drive is verified as a real thing.

If the NASA emdrive performance of 1.2 millinewtons per kilowatt.

8.3 TeraWatts of power would be needed to provide 10 million newtons of thrust to accelerate a 1000 ton space-craft at 1 gee of acceleration. We have no power source that could generate 8.3 TeraWatts for a 1000 ton spacecraft.

Continue reading “If EMdrive is real and scales with Q factor then we get almost Star Trek level Technology” »

Jun 23, 2017

Atomic imperfections move quantum communication network closer to reality

Posted by in categories: engineering, quantum physics

An international team led by the University of Chicago’s Institute for Molecular Engineering has discovered how to manipulate a weird quantum interface between light and matter in silicon carbide along wavelengths used in telecommunications.

The work advances the possibility of applying quantum mechanical principles to existing optical fiber networks for secure communications and geographically distributed quantum computation. Prof. David Awschalom and his 13 co-authors announced their discovery in the June 23 issue of Physical Review X.

“Silicon carbide is currently used to build a wide variety of classical electronic devices today,” said Awschalom, the Liew Family Professor in Molecular Engineering at UChicago and a senior scientist at Argonne National Laboratory. “All of the processing protocols are in place to fabricate small quantum devices out of this material. These results offer a pathway for bringing quantum physics into the technological world.”

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Jun 22, 2017

Scientists Demonstrate “Liquid Light” at Room Temperature for the First Time

Posted by in categories: nanotechnology, quantum physics

Researchers from Italy and Canada have made liquid light at room temperatures for the first time. The work paves the way for studying quantum hydrodynamics further and for future applications of this new type of matter in electronics devices.

Thanks to technological advances, scientists now have various ways of manipulating matter. Often times, these result in discovering new types of matter that posses unique properties — like the famous metallic hydrogen and the bizarre time crystal. The discovery of such materials leads to a wide range of potential applications in electronics. One of these is the so-called “liquid light,” a strange matter which researchers from the CNR NANOTECH Institute of Nanotechnology in Italy and the Polytechnique Montréal in Canada recently formed at room temperature for the first time.

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Jun 18, 2017

China Shatters “Spooky Action at a Distance” Record, Preps for Quantum Internet

Posted by in categories: cybercrime/malcode, internet, quantum physics, space

Results from the Micius satellite test quantum entanglement, pointing the way toward hack-proof global communications—and a new space race.

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Jun 18, 2017

The key to better wireless charging lies in quantum mechanics

Posted by in categories: mobile phones, quantum physics

Wireless charging is a great idea in theory: You can just place your device on a charging mat without having to mess with any wires. But it still doesn’t solve the main hassle of charging in the first place, which is the requirement to leave your device in one place. But now, scientists may have found the answer to that problem using principles from quantum mechanics.

Currently, wireless, or inductive, charging uses an electromagnetic field to transmit energy over very short distances. That’s why your phone, or whatever device you’re charging wirelessly, must remain near a wireless pad in order to actually charge. But Shanhui Fan and his team at Stanford University have published an article in Nature that details a wireless charging system that works even when the charger and device are a meter apart. You can also move around the device while it’s being charged without interrupting the power transfer.

It works by using a principle of quantum mechanics called parity-time symmetry to create a charger with a self-adjusting power flow. A connected amplifier automatically controls the flow of power between the transmitter and receiver. As a device moves further away from the charger, the power levels adjust automatically to ensure an even and uninterrupted flow of current.

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Jun 17, 2017

Quantum entanglement, science’s ‘spookiest’ phenomenon, achieved in space

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

Scientists beamed particles from a satellite to two locations on Earth 750 miles apart — and the particles were still mysteriously connected.

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Jun 16, 2017

China’s Micius satellite sets distance record for quantum entanglement in space

Posted by in categories: encryption, quantum physics, space

Chinese researchers report that they’ve set a new distance record for quantum teleportation through space, the phenomenon that Albert Einstein once scoffed at as “spooky action at a distance.”

The technology isn’t yet ready for prime time, but eventually it could open the way for a new type of unbreakable encryption scheme based on the weirdness of quantum physics.

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Jun 13, 2017

A Hybrid of Quantum Computing and Machine Learning Is Spawning New Ventures

Posted by in categories: quantum physics, robotics/AI

At the intersection of two challenging computational and technological problems, may lie the key better understanding and manipulating quantum randomness.

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