The world's first pure silicon quantum computer chip was born at the University of New South Wales

Traditional computers calculate and store information using "normal" bits consisting of "0" and "1". However, the "qubit" of a quantum computer can accomplish the same task faster and better in a distinctive way by means of a quantum physical phenomenon superimposed with any combination of "0" and "1". This new technology is expected to spark a revolution in the field of climate and drug research. Various architectures have been tested around the world and the first quantum computer processors that integrate millions of "qubits" are competing.

UNSW pure silicon quantum computer chip in operation

These include silicon spin qubits, ion traps, superconducting cycles, diamond vacancies, and top-up qubits. Unfortunately, in all of these architectures, the qubits are quite fragile and prone to computational errors.

Quantum processors, which contain only a few qubits, are often too big for mass production. The good news is that researchers from the University of New South Wales (UNSW) have developed a new chip design that addresses both of these pain points.

Researchers at UNSW have tended to use silicon spin quantum computing because they can reuse existing silicon-based microprocessor technology.

According to a paper published in a recent issue of Nature Communications, a new computing chip designed on the basis of a "complementary metal-oxide-semiconductor" (CMOS) process.

The silicon quantum processor consists of a huge two-dimensional quantum bit array, using traditional silicon transistors to control the spin of the qubit and two qubits to handle the logic interactions.

The essay, Dr. MennoVeldhorst said:

By choosing one of the electrodes on the qubit, we can control the spin of a qubit that stores a quantum binary code of '0' or '1'. With the selection of electrodes between qubits, it is possible to perform logical interactions or operations on two qubits.

World's first complete complete design of silicon quantum computer

The research team said that all the key components needed for quantum computing can be implemented in a single chip. In addition, the chip's architecture includes error-correction code that relies on multiple qubits that store a single data, designed specifically for spin qubits.

To be prepared for production, the UNSW team expects to make some necessary changes to the chip design as well. On the other hand, they are proud of the speed with which their current milestones have been achieved as they created a double-quantum-logic gate two years ago and demonstrated how to do quantum calculations on silicon.

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