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Saturday, January 30, 2021

Microsoft's Quantum Chip

Microsoft moves forward in quantum chip research. 

Microsoft’s new quantum chip could help control thousands of qubits  in Digital Trends by Luke Dormeh 

Microsoft doesn’t just make Windows and Surface tablets — it’s also doing some pretty interesting work with quantum computers. And, at least according to the Redmond, Washington-based company, it’s just made a notable advance in this domain.

Working with researchers from the University of Sydney in Australia, the Microsoft investigators say they have found a way to control thousands of qubits, the basic units of quantum information that are equivalent to binary bits in a classical computer, at extremely low temperatures.

This is important because one of the big challenges with quantum computers, which have the potential to change the face of computing as we know it, is something called qubit decoherence. This is the cause of many errors in quantum computing, and results from the environment interacting with qubits in a way that changes their quantum states.

“Each qubit needs to be controlled by a bunch of wires that typically run from racks of electronics at room temperature to the qubits at the end of a dilution refrigerator, at 0.01 degrees kelvin, [which is] close to absolute zero,” David Reilly, principal researcher and director of Microsoft Quantum Sydney, told Digital Trends. “Controlling qubits in this way taps out around 50 or so qubits. It simply doesn’t scale as an approach to controlling thousands of qubits and beyond. Running wires from racks of electronics resembles the first electronic computers of the 1940s rather than the integrated circuit chips we have today.”  ... '

Source Article from Microsoft

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