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Spinwaves Shown to Be More Efficient Quantum Memory

By - Source: PhysOrg | B 10 comments

The battle for more milliseconds is heating up.

Researchers in China and Germany said they have found a much more effective way to store data in a quantum system environment while being able to retrieve a significant share of the data. Using a magneto-optical trap, they were able to hold the data in a quantum state for 3.2 milliseconds.

That may not sound much, but is a huge step in quantum memory efficiency. Current storage durations in quantum systems are typically measured in nanoseconds and typically deliver about 200 to 300 nanoseconds of storage duration while providing 85 percent data retrieval capability. This new system gave researchers 3.2 milliseconds as well as 75 percent retrieval rate.

The key of the research is a magneto-optical trap the scientists used to slow down atoms via a laser beam. This process allowed them to "trap" them in a "vertical triangular trap". Adding a photon created a spin that affected all atoms and created a so-called spin wave. A second laser fired at the same frequency as the first but with the opposite polarization, which enabled the researchers to convert the spin back to a photon, revealing the quantum state information being held first in the original photon, and was transported through the wave.

Embedding information in this spin wave enabled the system to hold on to "quantum state information for a specified period of time", the researchers said. They now believe that optical lattices into the trap they could make the design even more efficient. The scientists also noted that this technology could be key to be able to create memory storage devices for an actual quantum computer.

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  • 8 Hide
    mouse24 , June 22, 2012 3:02 PM
    not 100% sure on what i'm reading but it sounds atom smashingly big.
  • 2 Hide
    killabanks , June 22, 2012 4:03 PM
    what kind of problems will quantum computers solve? sounds like we are still far off from a working prototype
  • 1 Hide
    house70 , June 22, 2012 4:12 PM
    3.2 ms? If it can solve a problem in less than that, then no issue at all, it can transmit the result to a "traditional" computer and then go to sleep.
  • 1 Hide
    subasteve5800 , June 22, 2012 4:12 PM
    killabankswhat kind of problems will quantum computers solve? sounds like we are still far off from a working prototype


    http://en.wikipedia.org/wiki/Shor%27s_algorithm
  • 1 Hide
    officeguy , June 22, 2012 4:31 PM
    Quantum computing just sounds so cool to me and I enjoy reading about it even though I will never understand it, nor that I would want too :) 
  • 0 Hide
    djscribbles , June 22, 2012 9:01 PM
    Am I the only one who is always gladdened at not pursuing a degree in physics when I see an article about quantum computing?

    edit: I mean, I consider myself a pretty smart guy, but that stuff just 'hurts muh brehn' :( 
  • 1 Hide
    upgrade_1977 , June 22, 2012 10:26 PM
    So they put the watchamachallit into the thingamajigger so the angle of the dangle is directly proportional to the heat of the beat?
  • 0 Hide
    MaxTesla , June 23, 2012 2:16 PM
    @upgrade_1977

    Yeah!

    :p 
  • 0 Hide
    master_chen , June 23, 2012 3:14 PM
    Quote:
    A second laser fired at the same frequency as the first but with the opposite polarization, which enabled the researchers to convert the spin back to a photon, revealing the quantum state information being held first in the original photon, and was transported through the wave.

    This actually sounds quite much the way Pulse Rifle from Unreal Tournament makes it's burst shots of plasma...
  • 0 Hide
    dreadlokz , June 24, 2012 3:10 AM
    Cool!