Seminars

# Hamburg Photon Science Colloquium | Quantum heterostructures providing topological protection

## by Werner Wegscheider (ETH Zürich, Switzerland)

Friday, December 6, 2019 from to (Europe/Berlin)
at DESY, Hamburg ( CFEL SR I-III (Bldg. 99) )
 Description An elegant approach to circumvent the decoherence problem in quantum computation are topologically protected systems. I will present design concepts based on two classes of semiconductor heterostructures to realize such topological protection. The first relies on highest-mobility two-dimensional electron gases in GaAs, which are essential for the fractional quantum Hall effect, the second on InAs/GaSb combined quantum wells as a platform for two-dimensional topological insulators.