Applying a short microwave pulse to the superconducting circuit containing the qubit and then measure the reflected microwave is the only method used to read the information in qubits. A similar method is required to read the information out of the qubits.
According to scientists, to extract any useful information, the method that reads information from qubits must take the least amount of time as possible, allowing as few errors as possible.
Joni Ikonen, a Ph.D. student at Aalto University has recently developed a faster way to extract any useful information from qubits.
Ikonen said, “We were able to complete the readout in 300 nanoseconds in our first experiments, but we think that going below 100 nanoseconds is just around the corner.”
“By improving the speed and accuracy of the information retrieved from qubits, scientists may be able to move closer to realising the promise of useful quantum computing.”
Dr. Möttönen, who co-supervised the work with Dr. Jan Goetz said, “This is an amazing result in getting the slippery qubits in order. I hope that it will help the community in the future to reach quantum supremacy and error correction, the path to a quantum computer of practical value.”
The study is presented in the journal Physical Review Letters.