So far we have seen how qubits can be realized in physical systems, and in what ways we can control them. We will now shift our focus to the kinds of errors that can occur and how to characterize them. In this video, Menno Veldhorst (QuTech) will explain relaxation and dephasing.
Which effect is more dominant in spin qubits: phase loss or energy loss?
Do we need to prepare a superposition state in a T1 experiment?
For a quantitative example of decoherence time see section “Relaxation and decoherence” here https://physicstoday.scitation.org/doi/full/10.1063/PT.3.4270
An example of more sophisticated pulse schemes can be found in https://science.sciencemag.org/content/336/6078/202