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The Diamond's Quantum Memory

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Vienna University of Technology researchers have joined a microwave quantum system with a diamond quantum system, taking the most useful features from each to create the next step toward feasible quantum-computer chips.

A quantum computer should be able to rapidly switch its state, but it has to conserve its quantum state for a long enough period of time so that calculations can be completed. The Vienna team combined the microwave system with the diamond system to meet all of the necessary requirements. The microwave resonator, which provides fast manipulations, is coupled with a thin layer of diamond, in which quantum states can be stored. When nitrogen atoms reach the regular carob structure of the diamond, the diamond gains the ability to store quantum states.

"We could show that in our quantum chip, quantum states can actually be transferred between the microwaves and the nitrogen-centers in the diamond," says Vienna researcher Robert Amsuss. The more nitrogen atoms that take part in the transfer of quantum information, the more stable the diamond's memory becomes.

From Vienna University of Technology
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