DIPC Colloquium: Quantum Computing and Spin Qubit Platforms
DIPC Seminars
- Speaker
-
Daniel Loss, Department of Physics, University of Basel, Switzerland
- When
-
2018/07/12
19:30 - Place
- Donostia International Physics Center
- Add to calendar
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I will provide an overview of quantum computing with focus on spin qubits in
semiconducting nanostructures such as quantum dots and nanowires for electron
and hole spins [1] from a theorist's point of view. Despite enormous
experimental efforts in many labs worldwide over the last twenty years,
progress to integrate many qubits has been slow due to many challenges posed
by material issues and the related coherence of spin qubits. Nevertheless, the
field has evolved steadily, in theory and experiment, and there is a strong
believe in the community that the ultimate goal of building a powerful quantum
computer most likely will be reached with spin qubits in semiconducting
quantum dots 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
chip and have them function at a clock speed of GHz. I will mention recent
developments and challenges for implementing surface code structures, in
particular for Si or Ge hole-spin qubits [2,3] in combination with
superconducting striplines [4].
[1] C. Kloeffel and D. Loss, Annu. Rev. Condens. Matter Phys. 4, 51 (2013).
[2] C. Kloeffel, M. Trif, and D. Loss, Phys. Rev. B 84, 195314 (2011).
[3] C. Kloeffel, M. J. Rancic, and D. Loss, Phys. Rev. B 97, 235422 (2018).
[4] S.E. Nigg, A. Fuhrer, and D. Loss, Phys. Rev. Lett. 118, 147701 (2017).