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Scientists have created programmable two-qubit quantum

Scientists have created programmable two-qubit quantum

A team of scientists from the United States and the Kingdom of the Netherlands managed to combine a pair of one-electron spin qubits into a processor and implement elementary quantum algorithms using it. Quantum dots were the basis for qubits.

Unstable qubit connections

Modern scientists could previously control only isolated qubits, which are not linked. This is why it was impossible to create a quantum computer with the computing power surpassing the power of classical machines.

Studying the ways of combining qubits into the system (this is the keystone of progress in quantum computers), scientists have faced another problem: the number of errors increases with increasing number of qubits.

The reason for that is the interference of certain qubits, as well as state leaks. This, in turn, leads to the increasing of material costs for calibration of equipment, and the time resource is wasted inefficiently.

Therefore, it is crucial to solve the problem of control over the system, which will include an increasing number of qubits.

500 qubits quantum computer

Some scientists achieved significant results. Physicist Mikhail Lukin, together with his team of scientists, created a 51 qubits quantum computer.

Rubidium-87 atoms in an optical trap were qubits in this case. IBM plans to soon build 20 qubits quantum computer for commercial purposes, providing access to its computing power via cloud.

Quantum computers development is not static. Some scientists want to create a 500 qubits quantum computer someday.

 

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