Speaker's Brief Introduction： Robert Joynt received his Ph.D. from the University of Maryland in1982 and was a postdoctoral fellow at the Cavendish Laboratory ofthe University of Cambridge and the Institute for Theoretical Physics atETH-Zurich. He was Professor of Physics at the University ofWisconsin-Madison from 1986 to 2023 and is now Emeritus Professor.He served as Department Chair and was the Founding Director of theMSc in Physics-Quantum Computing. He is Senior Fellow at the KavliInstitute for Theoretical Sciences in Beijing. His research has rangedfrom the quantum Hall effect to high-Tc superconductivity to neutronstars to quantum computing.
Abstract: Electric field noise is a source of several harmful effects inquantum-dot quantum computers. I will start with a generalintroduction to this noise, whose sources are not well understood. Iwill describe some theoretical tools based on Bayesian inference thatwe have developed in order to deduce the physical nature of thesources from experimental data. The most important consequence ofthe noise is decoherence, but I will argue that it also causes the qubitfrequencies to drift. This is also an issue for the smooth operation of aquantum computer.