Sylvain Nascimbène "Exploring quantum Hall physics with ultracold dysprosium atoms"

Abstract

This talk presents the realization of a synthetic quantum Hall platform based on ultracold dysprosium atoms, where one real spatial dimension is coupled to a synthetic dimension formed by the atom’s internal spin states. Raman-induced spin-orbit coupling generates a uniform artificial magnetic field and enables the emergence of Landau-level physics.

I will show different manifestations of this effective magnetic field, including chiral edge motion and a quantized Hall response. I will then discuss the study of a topological phase transition driven by competition between Raman and Bragg couplings. At the critical point, we observe robust half-quantization, and connect it to a Dirac band touching and parity anomaly.

Contact: Jérôme Dubail (j.dubail@unistra.fr), Tom Bienaimé (t.bienaime@unistra.fr)