A group of researchers from Google has created a quantum processor, which uses 72 superconductor qubits, combined into a two-dimensional array. A message about this was published in the company's blog.
Recall, quantum computers operate with a special type of bits - qubits. Unlike classical bits, these logic elements can be simultaneously in a state of "zero" and "one", yielding one of these values with a certain probability. This feature allows us to develop fundamentally new computational algorithms, which in some cases are much more productive than classical ones.
The main problem of creating quantum computers with a large number of qubits is associated with the occurrence of errors in computing, reading and writing information. The probability of such errors increases with the increase in the number of qubits in a quantum computer.
The Google team was able to solve this problem. The 72-qubit quantum processor presented by the researchers is executed in the same way as the 9-qubit precursor, however in the new computer the qubits are not connected by a chain, but form two square 6 * 6 arrays located one above the other. This arrangement allows you to track and correct errors that occur during the calculation.
Detailed details of the new computer its creators yet do not disclose, however, according to them, the device allows to achieve quantum superiority, which means the ability to solve obviously more complex tasks than those that are available to classical computers.
Note that in July last year, a Russian-American group of physicists, led by the co-founder of the Russian Quantum Center and Harvard University Professor Mikhail Lukin, created a programmable 51-qubit quantum computer. At that time, the system presented was the most difficult of its kind.