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Tech & Science New Cooling Technique Could Aid Development Of Quantum Computers

13:06  12 january  2017
13:06  12 january  2017 Source:   ibtimes.com

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Described in a paper titled “Sideband cooling beyond the quantum backaction limit with squeezed light,” published Thursday in the journal Nature, the technique could theoretically be used to cool objects to absolute zero, when matter FIGHT AIDS : 27 MEMBERS. [email protected]: 15 MEMBERS.

A sophisticated cooling technique — using lasers to cool individual atoms — was demonstrated at the National Institute of Standards in Technology in 1978 You can store information longer. If you were using it in a quantum computer , then you would compute without distortion, and you would actually

  New Cooling Technique Could Aid Development Of Quantum Computers © Provided by IBT US Cooling objects is simple, right? Put them in the freezer or just leave them outside if it is snowing. Not so if you are talking about microscopic mechanical objects, especially when you want to cool them to temperatures lower than a single packet of energy.

A sophisticated cooling technique — using lasers to cool individual atoms — was demonstrated at the National Institute of Standards in Technology in 1978, and is now used in a wide array of precise applications, such as atomic clocks. Using the same principle, NIST physicists have now “cooled a mechanical object to a temperature lower than previously thought possible,” passing the so-called “quantum limit” which imposes limits on accuracy for quantum scale measurements.

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Read: Scientists Unveil Blueprint For Large-Scale Quantum Computer . "If you want to buy a quantum computer , you’ll need to know which one is best for your application. New Cooling Technique Could Aid Development Of Quantum Computers .

New Cooling Technique Could Aid Development Of Quantum Computers . Scientists Create Device Where An Electron Can 'Talk' To A Photon.

Described in a paper titled “Sideband cooling beyond the quantum backaction limit with squeezed light,” published Thursday in the journal Nature, the technique could theoretically be used to cool objects to absolute zero, when matter exhibits almost no energy or motion.

The researchers took a microscopic mechanical aluminum drum — diameter of 20 micrometers and thickness of 100 nanometers — and put it in a superconducting circuit, which itself was placed inside an electromagnetic cavity. Microwave photons of “squeezed light” — the photons were purified, or stripped, of the unwanted fluctuations that could cause heating — were then used to create resonance in the cavity, which in turn caused the drum to beat. As the cavity filled up with photons, they leaked out, carrying with them phonons — mechanical units of energy — and thus lowering the total energy state of the drum to just a fifth of a single quantum of energy.

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One approach involves superconducting devices that, when cooled to temperatures of nearly 4 issue of Nature, Oliver and colleagues have reported a technique that could fill that gap. Better knowledge of these superconducting structures could hasten the development of a quantum computer .

Quantum Computing News. Read the latest about the development of quantum computers . The project could aid in the development of read more. Interference as a new method for cooling quantum devices. New technique can capture images of ultrafast energy-time entangled photon pairs.

NIST researchers applied a special form of microwave light to cool a microscopic aluminum drum to an energy level below the generally accepted limit, to just one fifth of a single quantum of energy. Photo: John Teufel/National Institute of Standards and Technology

Using the photons minus their “noise” is what allowed the scientists to transcend the generally accepted cooling limit, especially for objects that operate at low frequencies and are the most difficult to cool.

NIST physicist John Teufel, who led the experiment, said in a statement: “The colder you can get the drum, the better it is for any application. Sensors would become more sensitive. You can store information longer. If you were using it in a quantum computer, then you would compute without distortion, and you would actually get the answer you want.”

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