March 4, 2021
1:00-2:00 p.m.
Guido Burkard
Department of Physics, University of Konstanz, D-78457 Konstanz, German
ABSTRACT: This talk will highlight recent advances related to spin-based quantum information processing from a theoretical perspective, including the impact of new material systems and nanostructures and of electric spin control. We discuss the importance of spin-charge hybridization for spin qubit control and measurement, and present several examples. Recently, electric spin control using synthetic spin-orbit coupling due to magnetic field gradients in combination with the exchange coupling has allowed for electrically controlled one- and two-qubit gates for spins in silicon quantum dots. The valley degeneracy in silicon and other semiconductors offers both challenges and opportunities which will be discussed. An alternative approach to all-electric control of spin qubits consists in the use of multi-spin qubits containing more than one electron, a variety of which will be presented, such as the singlet-triplet, exchange-only, resonant-exchange, and quadrupolar qubits.
BIOGRAPHY: Guido Burkard is a Professor and Chair of the Physics Department at University of Konstanz. He earned his PhD from the University of Basel in 2001, followed by positions at IBM T. J. Watson Research Center, the University of Basel, and RWTH Aachen University. He is a member of the Editorial Board of Materials for Quantum Technology, was a member of member of the Editorial Board for Scientific Reports, and a Coordinating Founding Editor for Quantum, a peer-reviewed arXiv overlay journal. He was been awarded numerous prizes, including the Swiss National Science Foundation (SNF) Professorship and the LUKS and Löphi prized for teaching at the University of Konstanz.