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Superconducting circuits rely on an electronic component known as the Josephson junction, allowing them to manipulate quantum information and communicate with photons. Using a stimulated Josephson non-linearity, a team of researchers at Princeton University, Northwestern University, and the University of Chicago directly operated an oscillator. By operating it as an isolated two-level system, the team achieved quantum control of an oscillator by modifying its Hilbert space. Â The researchers believe that the new approach for controlling oscillators will allow the production of substantially more energy-efficient electronic components than most of the chips used today.
Reference Link:https://phys.org/news/2019-12-quantum-oscillator-josephson-circuit.html