Dr. Thaddeus Ladd
HRL Laboratories, LLC, Malibu, CA
Quantum information processing in a silicon platform has made substantial worldwide progress in recent years. Electron spins trapped by quantum dots or impurities in silicon make strong candidates for qubits, especially in light of extremely long coherence times (in some cases exceeding seconds) observed in isotopically purified material. However, challenges remain in handling noise and disorder in silicon nanostructures, for which many qubit design and control options exist. HRL Laboratories, LLC, has made recent progress in the development of qubits based on electron spins in triple quantum dots in isotopically purified Si/SiGe heterostructures. In this talk we discuss the all-electrical control of such qubits, including methods to measure and mitigate charge noise. The results indicate a strong future for silicon-based quantum technology.
Dr. Thaddeus Ladd is currently Senior Staff Research Physicist at HRL Laboratories in Malibu, California. He received his Ph.D. in 2005 from the Applied Physics Department of Stanford University as a fellow of the Fannie and John Hertz foundation. He continued quantum optics research at Stanford's E. L. Ginzton Laboratory as project researcher for the University of Tokyo and the National Institute of Informatics, Tokyo until 2009. His research interests include semiconductor-based quantum information science, especially the interface between robust control (including electrical, RF, and optical methods) and experimental noise modeling.
