Showing posts with label Quantum Mechanics. Show all posts
Showing posts with label Quantum Mechanics. Show all posts

Sunday, March 21, 2010

Quantum Mechanics Observed by the Human Eye [Quantum Mechanics]

Quantum Mechanics Observed by the Human Eye
Remember when, just the other day, we were talking about the future of storage, and how quantum mechanics is on the pipe dream, it's totally magic list for now? Yeah. Me too. Thing is, shit just got real:
Real, and more importantly observable. Observable is important because until this week when one talked about quantum mechanics they were either spouting a lot of unproven theory about things way too tiny to be measured or they were Lt. Cmdr. Geordi LaForge on the engineering deck of the Enterprise D.

No longer!
A team of scientists has succeeded in putting an object large enough to be visible to the naked eye into a mixed quantum state of moving and not moving.
Bwah? It reads like science fiction, to me, but apparently science guy Andrew Cleland and his team, at the University of California, Santa Barbara, were able to cool a tiny 30-micrometer metal paddle to the point where it reached a quantum mechanical ground state. Or, as my limited understand calls it, the place where nature starts to get all freaky deaky.

After the cooling process was complete, Cleland and company were able to 'simultaneously set the paddle moving while leaving it standing still.' Again: The metal paddle was both vibrating and not vibrating at the same time, and in a way that was observable by the naked eye.

Are you freaking out yet? Because I know a few cats in dark boxes that are right now.

[Gizmodo via Nature via Kottke]

Saturday, February 27, 2010

Engineers Solve 80-Year Old Puzzle to Make Computer Modeling 100,000 Times Faster [Science]


A quantum physics breakthrough that can predict the kinetic energy of electrons in simple metals—and semiconductors—will enable computers to simulate the behavior of new materials up to 100,000 times faster than they currently can. That's huge.

Princeton engineer Emily Carter led the project, which took an equation by Llewellyn Hilleth Thomas and Enrico Fermi that calculates how many electrons are distributed in a theoretical gas with evenly distributed electrons and figured out how to apply it to real, imperfect materials:
'The equation scientists were using before was inefficient and consumed huge amounts of computing power, so we were limited to modeling only a few hundred atoms of a perfect material,' said Emily Carter, Princeton engineer who led the project.

'Important properties are actually determined by the flaws, but to understand those you need to look at thousands or tens of thousands of atoms so the defects are included. Using this new equation, we've been able to model up to a million atoms, so we get closer to the real properties of a substance.'
The results of that effort mean that principles of quantum mechanics, previously limited to small bits of matierals, can now be applied on a large scale. Modeling, then, for anything from fuel-efficient cars to electronic devices, will happen exponentially faster than it does today. Innovation just got an upgrade.
[Gizmodo via Princeton via PopSci]