Intel learned to control hot qubits. This will increase the efficiency of quantum computers, the company said.
The application of quantum computing to practical tasks depends on the ability to scale and control thousands, if not millions of qubits, simultaneously with a high level of accuracy. However, modern designs of quantum systems are limited by the overall size of the system, the accuracy of the qubit, and especially the complexity of the control electronics necessary for controlling a quantum on a large scale.
There is another significant limitation. Until now, quantum computers have had to operate at temperatures in the range of millikelvins just above absolute zero (–273.15°C) – for comparison, the average temperature in outer space is –270.15°C.
Now, Intel engineers, along with QuTech, have learned how to control “hot” qubits, the temperature of which is slightly above –272.15. They are one degree warmer than usual and are also more connected and dense.
Raising the temperature at which qubits can work, simplifies the placement of the electronics of a quantum computer on a single chip – this, in turn, greatly simplifies the interconnects between them, the company said.
“This work represents significant progress in the study of silicon spin qubits, which, we believe, are promising candidates for the creation of industrial-scale quantum systems. Our demonstration of hot qubits that can operate at higher temperatures, while maintaining high fidelity, will allow us to use various options for local control of the qubit, without affecting its performance”.
Jim Clark, Director of Quantum Equipment, Intel Labs