Posted in | News | Electronics

Coupling Nitrogen Centers in Diamond brings Quantum Computing A Step Closer

Why diamonds?

The research results confirm a hypothesis on the special properties of diamonds which has been put forward by the Stuttgart scientists Prof. Dr. Jörg Wrachtrup and Dr. Fedor Jelezko several years ago: color centers or NV centers are immobile in the surrounding carbon lattice - whereby N stands for nitrogen and V for a vacancy. Since there is actually no "diffusion" inside a diamond, the atoms won't migrate back and forth. When targeted by a laser, the two nitrogen centers will react and a manipulable superposition of their spin states - the rotational movement of electrons - results. These highly complex studies were conducted in Stuttgart.

NV centers are immobile in the surrounding carbon lattice. When targeted by a laser, the two nitrogen centers will react.

Simultaneous multiple states

Spin up - spin down: these are primarily the two states the coupled atoms can assume, comparable with "0" and "1" in a computer. However, the processes in this quantum "circuit" are much more sophisticated. "Microscopical and quantum mechanical systems prepared this way differ totally from our everyday experience and can take on, for example, several states at one and the same time," says Jan Meijer. "You can almost compare them with two conventional PC memory devices coupled in such a manner that they interfere with each other."

Quantum computer: the first step is made

That the coupling of the atoms in the diamond's color center even works at room-temperature is the crucial requisite for building a quantum computer. Meijer: "Basically it is imaginable and possible to create several of these NV centers deliberately by means of ion implantation, couple them together in a scalable fashion and have a classical computer control it all." The number of couplings is now to be increased step by step. "This is a great challenge," says Meijer, "because the greater the number of couplings, the faster the system will fall apart."

Unlimited possibilities

The possibilities are - theoretically - immeasurable: if we were to connect only 100 of these NV centers with each other, we would get two to the power of 100 coupled memory cells. "Physically, this is considerably more than we need to store the entire knowledge of humankind," as Dr. Meijer explains the dimensions. A totally new computer technology can be built by applying the laws of quantum mechanics - with it, we could, for example, calculate the properties of complex biological molecules or crack codes within a fraction of a second.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type
Submit

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.