The newly designed Qubit type can help make quantum computers stronger

If successfully built, this type of Qubit will make the correlation between qubit numbers and quantum computer sizes no longer a problem.

Australian researchers have recently designed a new type of qubit - which serves as the basis of quantum computers - that, according to them, will enable us to build a quantitative calculator. caliber death.

At the present time, there are several options for creating a quantum computer . Small sized machines will be extremely complicated, but if pursuing simplicity, the size of the machines will become extremely huge.

The problem of size always causes headache for quantum computer researchers.

Overall the advantage of traditional qubit processing methods is that they are based on available technology and equipment, making it easier to build quantum computers. But when placed in a size relationship with the number of qubits that need to be processed, when there are thousands of qubits connected to the computer, the size of the quantum computer will become too big to be possible. installation.

But the new qubit discovered by researchers in Australia can be controlled by electrical signals instead of magnetic signals as before. This means that qubits can keep quantum entanglement at much greater distances than before.

"If they are too close or too far apart, the state of " quantum entanglement " between qubits will not happen" - Guilherme Tosi, the researcher who discovered the new qubit, said.

New qubits can keep quantum entanglement at a distance of a few hundred nanometers, so we can theoretically build quantum computers on silicon.

Of course we are only talking in theory, because what researchers currently hold is just the design of the machine. But according to research leader Andrea Morello, this finding is very important for quantum computer science.

This type of qubit works by encrypting information on both the nucleus and the electron of the phosphorus atom inside the silicon chip, and connecting them to an electrode network. Then the whole device will be cooled to almost 0 degrees absolute; then put in magnetic environment.

The new qubit can keep quantum entanglement at a distance of a few hundred nanometers.

The value of these qubits will be determined by the temporary binary values ​​called spin - if the electron is above and the nucleus is below, the value will be 1. Otherwise, the value is 0.

"To control this qubit, you will have to pull the electron a little further away from the nucleus with the electrode above. When you do that, you have also created an electric dipole. This is quite an important point, because electric dipoles interact with each other at quite a distance, about 1000 nanometers ".

"This also means that we can place far more qubits than before. So there will be more space to place other components; while still maintaining the accuracy of quantum bits. ".

What this new qubit offers is a balance for future quantum computers to be scaled down, but still not too complicated.

This research was published in Nature Communications.