Qubits, data held in absolute zero state
Intel Proves Qubit Controllability at 1K+ On the 17th, Intel, together with QuTech, announced in Nature a research paper that qubits, the basic unit of quantum computing, can be controlled at temperatures above 1K (Kelvin).

▲ Illustration of the quantum entanglement of two 'hot qubits' [Image = Q-Tech]
Current quantum computers can only operate in the millikelvin (mK) range, just slightly above absolute zero. Quantum data stored in a qubit is quickly lost if the qubit is not in a state of absolute zero (-273.15°C or 0K).
Practical use of quantum computing requires the ability to simultaneously scale and control thousands of qubits with high levels of accuracy, a feasibility that is difficult to achieve with current quantum system designs. This is because the system size has to be large because a cooler is essential, the accuracy of the qubits is low, and the electronic control devices required to manage a large number of quantum are complex.
Through this research on 'hot qubits', Intel and QuTech have proven the hypothesis that silicon qubits can operate at slightly higher temperatures than current quantum systems, that is, above 1 K (-272.15℃).
It was also demonstrated that two-qubit control can be achieved with up to 99.3% accuracy each.
Until now, each qubit required one electronic control unit, but now the way has been opened for controlling two or more qubits with one electronic control unit. This has made it possible to create quantum integrated circuits similar to current silicon integrated circuits.
The research team also demonstrated that the performance of spin qubits is least affected by external influences in the temperature range from 45 mK to 1.25 K.
Meanwhile, Intel announced the industry's first cryogenic quantum control chip, 'Horse Ridge', late last year.
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