<![CDATA[io9: quantum computing]]> http://tags.lifehacker.com/assets/base/img/thumbs140x140/io9.com.png <![CDATA[io9: quantum computing]]> http://io9.com/tag/quantumcomputing http://io9.com/tag/quantumcomputing <![CDATA[Meet Two New Quantum Particles: Spinons and Holons]]> The latest development in particle physics reveals the "indivisible" electron might not be so indivisible in all situations. Scientists at Cambridge University have discovered that electrons in quantum-scale wires can break into two smaller particles, called spinons and holons.

The breaking-apart effect only happens when a lot of electrons are competing for not a lot of space. Since the electrons repel each other, if they are put into a very narrow wire, they find it harder and harder to move past each other. The electrons apparently respond by breaking their magnetism and charge into two separated particles, the spinons and holons.

The experiment that this team used to test their breaking-up-electron hypothesis is also pretty interesting. The team had to get electrons into a very thin wire, take the whole thing down to near-absolute-zero temperatures, and then observe how electrons bounced between that wire and a close-by metal.

When the metal and the wire are near each other, the electrons do their "quantum tunneling" thing, and the scientists take measurements under a variety of magnetic fields to see what is happening when the electrons jump. These measurements eventually indicated that the jumping electrons had to be falling apart into two new particles.

The discovery, detailed in Science magazine, has some pretty strange implications for particle physics, but it also might prove important in quantum computing. Quantum wires are used to connect components in a quantum computer, and these computers might have to account for the effect of these distressed electrons breaking into smaller particles. If nothing else, high school science teachers might have to put a new spin on the "indivisible electron" story.

Discovery About Behavior Of Building Block Of Nature Could Lead To Computer Revolution [via ScienceDaily]
Probing Spin-Charge Separation in a Tomonaga-Luttinger Liquid [Science Magazine]

(Image: a series of spinon-holon chains, from a Nature Physics cover in 2007)

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<![CDATA[Super Small, Super Powerful Quantum Processor Can Solve Multiple Problems At Once]]> Soon your processor might be able to do three things at once. In a major stride towards commonplace quantum computing, a Yale university team has just unveiled a new two-qubit quantum processor that actually looks like a conventional computer chip.

The chip's qubits (or quantum bits, a unit for quantum information) are built from billions of aluminum atoms, but they function like single atoms. They work just like regular computing bits, being in either a "1" or "0" state. The difference is that qubits can hold superpositions of multiple states, so they can hold much more data and process much more information.

And the fact that this new quantum device looks like a conventional processor means we may not be too many steps away from central processors comprising qubits, making their power and capacity above and beyond what we can imagine for current processors.

That means this electronic quantum processor can do exponentially more than conventional processors in much less space. As reported in an upcoming article in Nature, The team already has their processor doing basic algorithms.

Armed with processors like this new device, the next generation of quantum computers might be the natural extension of Moore's Law, allowing for smaller and smaller computers. And we thought the iPhone was impressive.

First Electronic Quantum Processor Created [via Science Daily]
Demonstration of two-qubit algorithms with a superconducting quantum processor [Nature]

(Image: Blake Johnson/Yale University)

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