Quantum Coherence Lab

Zumbühl Group


"Evolution of the Quantum Hall bulk spectrum" published in Nature Communications!

Using a GaAs cleaved-edge quantum wire, we perform spectroscopy revealing the momentum and position of the quantum Hall edge states with unprecedented precision. We present models in excellent agreement with the experiment—thus providing direct evidence for the bulk to edge correspondence. In addition, we observe Fermi level pinning, exchange-enhanced spin splitting and signatures of edge-state reconstruction. Published on Sept. 12 in Nature Communications, accompanied by an Uni News and a tweet.