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Physicists Demonstrate Quantum Entanglement In Mechanical System

 
Anonymous Coward
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06/07/2009 11:59 AM
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Physicists Demonstrate Quantum Entanglement In Mechanical System
Physicists at the National Institute of Standards and Technology (NIST) have demonstrated entanglement—a phenomenon peculiar to the atomic-scale quantum world—in a mechanical system similar to those in the macroscopic everyday world. The work extends the boundaries of the arena where quantum behavior can be observed and shows how laboratory technology might be scaled up to build a functional quantum computer.


The research, described in the June 4 issue of Nature, involves a bizarre intertwining between two pairs of vibrating ions (charged atoms) such that the pairs vibrate in unison, even when separated in space. Each pair of ions behaves like two balls connected by a spring (see figure), vibrating back and forth in opposite directions. Familiar objects that vibrate this way include pendulums and violin strings.

The NIST achievement provides insights into where and how "classical" objects may exhibit unusual quantum behavior. The demonstration also showcased techniques that will help scale up trapped-ion technology to potentially build ultra-powerful computers relying on the rules of quantum physics. If they can be built, quantum computers may be able to solve certain problems, such as code breaking, exponentially faster than today's computers. (For further details, see: [link to www.nist.gov]
"Where the boundary is between the quantum and classical worlds, no one really knows," says NIST guest researcher John Jost, a graduate student at the University of Colorado at Boulder and first author of the paper. "Maybe we can help answer the question by finding out what types of things can—and cannot be—entangled. We've entangled something that has never been entangled before, and it's the kind of physical, oscillating system you see in the classical world, just much smaller."

Mechanical oscillators like two pendulum-based clocks have previously been synchronized, but their vibrations can still be independent, so that changes in one have no effect on the other. Quantum entanglement—"spooky action at a distance," in Einstein's words—is a far more counterintuitive process: If two objects are entangled, then manipulating one instantaneously affects the other, no matter how far away it is. Entangled objects do not necessarily have identical properties, just properties that are linked in predictable ways.

Jost and colleagues entangled the vibrational motions of two separated mechanical oscillators, each consisting of one beryllium and one magnesium ion. Each pair behaves like two objects connected by a spring 4 micrometers (millionths of a meter) long, with the beryllium and magnesium moving back and forth in opposite directions, first toward each other, then away, then back again. The two pairs perform this motion in unison, even though they are 240 micrometers apart and are located in different zones of an ion trap. The scientists created the desired entangled state at least 57 percent of the time they tried, and have identified ways to improve the success rate.

[link to www.sciencedaily.com]

Last Edited by Phennommennonn on 09/10/2011 07:03 PM
Anonymous Coward
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06/07/2009 12:03 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
Great post. Thanks OP.

The next demonstration we'll be hearing about is macroscopic entanglement.
Anonymous Coward (OP)
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06/07/2009 02:16 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
Great post. Thanks OP.

The next demonstration we'll be hearing about is macroscopic entanglement.
 Quoting: Anonymous Coward 630447

hf
Anonymous Coward (OP)
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06/07/2009 02:37 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
Anonymous Coward
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06/07/2009 02:44 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
Old International V-8s were prone to this as well chuckle
Anonymous Coward
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06/07/2009 02:48 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System

 Quoting: Anonymous Coward 693837

no sound :P
Anonymous Coward (OP)
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06/07/2009 02:50 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
... I hope this one is better

Anonymous Coward
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06/07/2009 02:53 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
Oh this is NIST....nevermind
Anonymous Coward
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06/07/2009 02:54 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
Wouldn't the obvious application of this technology be non-radio wave, faster-than-light speed communication devices?
Anonymous Coward (OP)
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06/07/2009 02:54 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
Stanford.. yeh
whats up?
Normal Is Subjective

User ID: 697099
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06/07/2009 03:49 PM
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Re: Physicists Demonstrate Quantum Entanglement In Mechanical System
Great post. Thanks OP.

The next demonstration we'll be hearing about is macroscopic entanglement.
 Quoting: Anonymous Coward 630447


Or NIST will be using this to buttress their support of the "official" 911 theory.
I thought I'd beat the inevitibility of death to death just a little bit.





GLP