Posts tagged with ‘quantum physics

The simple principle that illustrates how we may have been misinterpreting quantum mechanics this whole time

At the quantum level, things have been described as “super weird” and “doesn’t make any damn sense based on what we know”, what with quantum particles appearing and disappearing, moving across time and space instantaneously, spontaneously come into being and annihilate, seeming to exist in multiple places at once, etc etc. But one interesting experiment has shown that perhaps the quantum world does operate with some kind of mechanics we already understand, even by certain principles of classical physics.

The experiments involve an oil droplet that bounces along the surface of a liquid. The droplet gently sloshes the liquid with every bounce. At the same time, ripples from past bounces affect its course. The droplet’s interaction with its own ripples, which form what’s known as a pilot wave, causes it to exhibit behaviors previously thought to be peculiar to elementary particles — including behaviors seen as evidence that these particles are spread through space like waves, without any specific location, until they are measured.

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Physicists make a quantum teleportation breakthrough with the magic of diamonds

Quantum teleportation via quantum entanglement has been something that a whole lot of the world’s brightest minds have been putting a lot of time and energy into, but so far, manipulating the weird rules of the quantum world to our own uses has been mostly elusive. But scientists at the Kavli Institute of Nanoscience Delft say they’ve managed to reliably teleport quantum info stored in one bit of diamond to another sitting three meters away (roughly 10 feet). Now, they want to go much farther.

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New quantum theory might explain the weird flow of time

We now know that time is a thing and not just a meaningless manmade concept, a thing that can speed up and slow down and be warped, but what the hell is it exactly and why does it seem to march forward unimpeded by much of anything else at all? Why does it not jive with any bit of classical physics and only barely seems to work with quantum physics. Now, physicists are unmasking a more fundamental source for the arrow of time: Energy disperses and objects equilibrate, they say, because of the way elementary particles become intertwined when they interact — that strange effect called quantum entanglement.

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Courtney Love discovers direct evidence of Big Bang cosmic inflation, and by Courtney Love, I mean scientists

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Researchers from the BICEP2 collaboration today announced the first direct evidence for this cosmic inflation. Their data also represent the first images of gravitational waves, or ripples in space-time. These waves have been described as the “first tremors of the Big Bang.” Finally, the data confirm a deep connection between quantum mechanics and general relativity.

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Scientists create a quantum quasi-particle called the dropleton, close cousin of the Carlton

Physicists in Germany and the US developed an entirely new kind of particle that doesn’t exist in nature, called a dropleton. 

Writing in the journal Nature, they said it behaves a bit like a liquid droplet and described it as a quasiparticle — an amalgamation of smaller types of particles.

The discovery, they added, could be useful in the development of nanotechnology, including the design of optoelectronic devices. These include things like the semiconductor lasers used in Blu-ray disc players.

The microscopic quantum droplet does not dawdle. In the physicists’ experiments using an ultra-fast laser emitting about 100 million pulses per second, the quantum droplet appeared for only about 2.5 billionths of a second.

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Alice in Quantumland – an imaginative allegory of quantum physics, written and illustrated (!) by a CERN physicist, doubly brilliant for flying in the face of gender stereotypes with a female protagonist who makes sense of some of the most intense science of all time.
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Alice in Quantumland – an imaginative allegory of quantum physics, written and illustrated (!) by a CERN physicist, doubly brilliant for flying in the face of gender stereotypes with a female protagonist who makes sense of some of the most intense science of all time.

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Stephen Hawking says fuck you, there’s no black holes

At least not “black holes” as they’re currently defined, where there’s an even horizon, a point at which light or nothing else can escape once it gets sucked in. While his paper has not been peer reviewed, what he’s essentially saying is that because of quantum fluctuation, stuff can and does escape from black holes, which basically just takes the “black” out of black holes. Everyone could just say “Stephen Hawking says things can escape from a black hole”, but instead, it sounds a lot better to say “there are no black holes”.

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In 39 minutes, quantum computing took a massive leap forward

39 minutes. It may not seem like a lot, and obviously compared to the computer you’re reading this on, working for 39 minutes sounds kinda lousy. But in terms of quantum computing, it’s a big, big, big deal. That’s how long scientists were able to hold a qubit’s memory state for, which is way longer than anyone had previously been able to accomplish. 

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Physicists discover a geometric jewel at the heart of quantum physics

Every good attempt to try and reign in the weird world of quantum physics has so far met with mixed results, but the discovery of a multifaceted, multidimensional geometric shape at the heart of quantum physics may make things a little more predictable. And it would even make the ancient Greeks get a boner in their togas, considering how big they were on beautiful geometry being the basis for everything.

There’s a lot to summarize, but the above shape is called an amplituhedron and in its geometry are all the probabilities of particle interaction.

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Submitted by Delsyd

Physicist Disentangles ‘Schrodinger’s Cat’ Debate

Physicist Art Hobson has offered a solution, within the framework of standard quantum physics, to the long-running debate about the nature of quantum measurement.

In an article published August 8 by Physical Review A, a journal of the American Physical Society, Hobson argues that the phenomenon known as “nonlocality” is key to understanding the measurement problem illustrated by “Schrodinger’s cat.”

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Physicist Jim Al-Khalili looks at how the European Robin, may be relying upon the strange rules of quantum entanglement to find its way south each year.

Quantum Life: How Physics Can Revolutionise Biology

Theoretical physicist Jim Al-Khalili gives this fascinating lecture on the interaction between biochemistry and quantum mechanics. The topic is pretty interesting, and Jim is great at explaining some of the key ideas of quantum physics in layman’s terms.

Quantum physics video of the day: “The Origin of Quantum Mechanics”

Where did the whole idea of quantum theory come from? You have questions, the internet has answers.

Quantum entangled particles appear to smash the second law of thermodynamics to bits

Over the years, there have been many challenges to the second law of thermodynamics— that law that says there is no free energy and you can’t get something for nothing— some of them have been valid, some have not. In a recent experiment from Japan, it was found that quantum entangled particles take that second law and just blow by it like it wasn’t even there. Free energy? Apparently so.

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Egyptian teen invents revolutionary new space propulsion system

Two thousand years ago, Egypt was one of the great academic centers of the world. And now, one 19 year girl old named Aisha Mustafa has invented a quantum physics based propulsion system that would make the ancient Egyptian scholars proud, and it could represent the future of space travel.

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