June 1, 2017
11:00 AM - 12:00 PM
Speaker: Daniel Loss
Professor, Department of Physics
University of Basel, Switzerland
Title: Spin Qubits in Semiconductors: An Overview and Outlook
This talk will provide an overview of spin qubits in semiconducting nanostructures such as quantum dots and nanowires for electron and hole spins from a theorist's point of view. Despite enormous experimental efforts in many labs worldwide over the last twenty years, progress has been slow due to many challenges posed by complex material issues and the related many-body physics limiting the coherence of spin qubits. Nevertheless, the field has evolved steadily, in theory and experiment, and there is a strong belief in the community that the ultimate goal of building a powerful quantum computer most likely will be reached with spin qubits in semiconductor material which have the advantage of being inherently small and fast: In principle, it is possible to fit a billion spin qubits on a square centimeter and have them function at a clock speed of GHz. I will mention recent development and challenges for implementing surface code structures, in particular for Si or Ge hole-spin qubits in combination with superconducting striplines. If time permits, I will mention some recent theoretical ideas on hybrid systems which aim at combining topological qubits, such as Majorana fermions and parafermions, with spin qubits.