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AMD's Shanghai Chips Revealed [CPUs]

AMD's Shanghai Chips Revealed [CPUs]

The rat race continues: Shanghai will be 45nm, have up to 12 cores, include the long awaited Hypertransport 3.0 for socket-to-socket and southbridge communication, and can emulate quad channel memory. For more: [DailyTech]

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NASA's 2009 Cryosphere Video Is Really Cool, Literally

[youtube]http://www.youtube.com/watch?v=PjAXoETeVIc[/youtube] Check Out the Video in the post Above. Did you know that there is something called "cryosphere" on this little blue gem called Earth? I didn't. And I didn't know that seeing it animated from thousands of satellite high definition photog

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The Entangled Light Emitting Diode

The Entangled Light Emitting Diode

I don't know when optical quantum computers are going to arrive, but I sure hope they look like this crazy Toshiba visualization of an Entangled Light Emitting Diode. This new LED type could finally make practical quantum computers possible.According to Mark Stevenson—from Toshiba Research Euro

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Mighty Mouse Has One Less Gene, Lives 20% Longer

Mighty Mouse Has One Less Gene, Lives 20% Longer

Researchers have created a mightier mouse: By deleting a single gene from a mouse's genetic makeup, they've enabled it to suffer fewer age related ailments and live 20% longer. On humans, that'd be about 16 bonus years. So what exactly did those crazy scientists do? They bred mice with the "gene t

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Microsoft Announces InstaLoad, Batteries That Work Any Way You Insert Them

Microsoft Announces InstaLoad, Batteries That Work Any Way You Insert Them

Microsoft just introduced InstaLoad, a new battery technology that allows batteries to be placed in any direction without regard to positive or negative polarity. Meaning you can put a battery in however you want and it'll just work. It's genius. InstaLoad uses a new, patented contact design

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Dell's Inspiron Duo Is a 10 Netbook/Tablet Transformer

Dell's Inspiron Duo Is a 10 Netbook/Tablet Transformer

What, pray tell, is this? It's Dell's new Inspiron Duo, a 10" tablet that opens up and twirls its screen to transform itself into a netbook. Craziest of all? They're saying it'll be available before the end of the year. Dell showed off the crazy little guy, which runs Windows 7 Premium and packs

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Zune HD Is Real, Has Multitouch Web Browsing, OLED Screen and HD Video

Zune HD Is Real, Has Multitouch Web Browsing, OLED Screen and HD Video

Microsoft officially announced the Zune HD today, confirming the earlier rumors and fleshing out the hardware side a bit. It's clearly going to go head-to-head with the iPod touch, featuring multitouch and a web browser, but will its high-end media features be enough to dethrone the touch? The flas

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Samsung BD-P3600/P4600: Super-Slim, Wall-Friendly Blu-ray Decks

Samsung BD-P3600/P4600: Super-Slim, Wall-Friendly Blu-ray Decks

Samsung's latest two BD-Live Blu-ray decks are design conscious to the max—one is a wall-mountable 1.5-inches thin (BD-P4600) and the other is a low-profile, sleek tabletop deck (BD-P3600), and both stream Netflix and Pandora. Nice to see some creativity in the BD player z

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Scientists lay groundwork for an ac-driven quantum motor

The smallest electric motor could be built from just two ultracold atoms moving in a ring by lasers, according to researchers at University of Augsburg, Germany

In their latest paper, Alexey Ponomarev, Sergey Denisov, and Peter Hänggi detail the working principles of a theoretical idea for the smallest possible machine and demonstrate that it is able to perform useful work.

The motor consists of one neutral (the starter) atom and one charged (the carrier) atom trapped in a ring-shaped optical lattice, or “bracelet”. Once a magnetic field is applied, the charged atom feels the magnetic flux and moves–but yields no net motion. When placed in the same well of the lattice, like two eggs in the same compartment of a carton, the neutral atom provides a kick to the carrier atom. This kick causes the carrier atom to jump from one site in the lattice to the next, resulting in net movement around the ring.

The use of a starter atom helped the research team overcome a fundamental problem with a quantum motor, which is that rotation would occur both clockwise and counterclockwise, canceling out movement and resulting in no work output. (This aspect is examined in another paper published in June ‘09).

The presence of the neutral atom helps kick-start the motor, but that process also requires some kind of asymmetry which is provided by a combination of a symmetry-breaking driving field. The team found that the motor velocity can suitably be controlled by that asymmetry and manipulation of the external magnetic ?ux.

Technology Review claims that while the Augsburg team is the first to come up with a detailed analysis of how such a motor works and under what conditions it best works, they were not the first to build a quantum motor. The credit for that goes to a team from the University of Glasgow in the UK who built one in 2007 that they called an optical ferris wheel for ultracold atoms.

In any case, Ponomarev and his team have outlined their next steps. They may introduce more atoms into their motor setup to include several interacting carries or starters.

“A particular interesting objective to pursue is the problem of whether the motor velocity can be optimally tuned with the number of participating atoms,” they wrote.

They also plan to connect the motor to a nanomechanical resonator that, among many things, can provide ultra-sensitive detection of tiny displacements and forces.  A hybrid system like that, they said, would allow you to a “classical” object (electrical/nano-sized) using a quantum motor.

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