Great achievement in quantum industry; Scientists have entangled 51 qubits for the first time!

An unprecedented number of quantum bits (qubits) are entwined inside a quantum computer. Previously, scientists had repeatedly tried to achieve such a goal through a relatively large number of qubits; However, none of the previous attempts to entangle qubits were successful.

When two quantum particles are entangled, changing the property of one of them causes the same property to change in the other. For more numerous particles, not only can both particles be entangled; Rather, it is possible to intertwine each one of them with each other.

written by Toms Hardover And New ScientistIn the late 1980s, scientists investigated how three or four particles of light are entangled in a complex way. Some time ago, 27 qubits were entangled inside a quantum computer.

now, Xiao-Bo Zhou and his colleagues at the University of Science and Technology of China say they have increased the number of entangled qubits to 51. They used the Zuchongzhi quantum computer to achieve their new achievement.

The Zuchongzhi computer was already solving complex problems so fast that Chinese scientists claimed it had achieved “quantum supremacy.” This means that none of the traditional supercomputers can defeat Zuchongzhi.

The Zuchongzhi computer contains 66 superconducting qubits. These qubits are tiny rings that conduct electricity without wasting it. Using microwaves, scientists controlled the state of qubits and adjusted how qubits interact with each other by hitting them with magnetic field pulses.

Scientists used this method to apply a quantum logic gate to a large number of qubit pairs simultaneously. A quantum gate is a basic quantum circuit and is basically a sequence of processing operations that change the quantum state of qubits. In this case, scientists were able to intertwine 51 qubits arranged in a linear fashion and 30 qubits arranged in a two-dimensional plane to set two new records.

Nathan Lacroix, from the Federal Institute of Technology Zurich, says scientists have already built similar systems with up to 57 qubits; But they could not confirm that each qubit was entangled with all the other qubits.

Charles Hill, from the University of New South Wales, Australia, says that entanglement is one of the important differences between traditional computers and quantum computers and plays a significant role in quantum algorithms. Hill and his colleagues previously designed a system with 65 qubits; But the qubits in that system were simply entangled in sets of pairs, not groups.

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