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A team of scientists and engineers from the University of Sydney, Microsoft, and EQUS, the Australian Research Council Centre of Excellence for Engineered Quantum Systems, has taken a step toward developing a new generation of efficient quantum computers. Standard computers use bits, and qubits are the quantum equivalent to such bits. Qubits are capable of much faster performance because they are not binary and do not process information using zeros and ones. Quantum computers, on the other hand, have only been able to handle a few hundred qubits due to a number of factors. That’s why the latest Gooseberry cryogenic chip is such a revolutionary.
Physical qubits, which are error-prone, are currently used in quantum computers. To create a single logical qubit error-free, 1,000 physical qubits are estimated to be needed, a goal that has yet to be achieved. Devices of up to 5,000 physical qubits have been built up until 2020. However, a commercially useful quantum computer is expected to be a 200 logical qubit machine with 200,000 physical qubits.
Qubits, or quantum bits, work at temperatures near to absolute zero in most quantum systems (-273.15 degrees). This is to save them from losing their ‘quantumness,’ the property of matter or light that quantum computers use to conduct their specialised calculations.
Quantum devices need instructions in order to function properly. This involves transmitting and receiving electronic signals between qubits. There are a number of wires in modern quantum architecture.
To manipulate the signals, current devices produce a stunning series of wires that resemble an inverted gilded birds’ nest or chandelier. They’re attractive, but they’re inherently impractical. It means we won’t be able to scale up the computers to do practical calculations. Professor Reilly, who is also the Chief Investigator at the ARC Centre for Engineered Quantum Systems (EQUS), said, “There is a real input-output bottleneck.”
Gooseberry is a CMOS chip that takes digital inputs and produces thousands of parallel qubit control signals, allowing for scaled-up support for thousands of qubits, according to Microsoft. Also, with only three wires, the second Gooseberry chip attaches to the external world, transmitting digital signals to and from the classical computer that operates the quantum computer.
This new generation gooseberry chip will guide the quantum computing in the future.
Gooseberry and the integrated cryo-compute core, according to Microsoft and University of Sydney researchers, are significant advances in quantum computing. The cryo-compute core, which serves as an interface between developer-written source code, Gooseberry, and qubits, indicates that various types of code can be compiled and run in a cryogenic environment, allowing for software-configurable connectivity between qubits and the outside world.
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