Under high magnetic field and at low temperatures, electronic interactions in a two-dimensional electron gas give rise to exotic, strongly correlated many-body quantum Hall states. These states have been proposed for the implementation of new quantum circuits, for instance realizing topologically protected quantum computing. Although exciting, these states remain poorly understood, because the conventional experimental approach for their investigation, dc electron transport, only yields limited information. In particular, electron transport only probes the physics of the current-carrying edge channels of the quantum Hall effect propagating along the edges of the electron gas, leaving the physics of the bulk unexplored. To gain a better understanding of these exotic states and their origin, we propose a new, unconventional approach, based on heat transport measurements, which directly probes the charge-neutral, heat-carrying collective modes characterizing these interactions-induced states. 

QUAHQ is a ERC-funded project implemented at the Service de Physique de l'Etat Condensé (joint lab between Université Paris-Saclay, the french Centre National de la Recherche Scientifique, and the french Commissariat à l'Energie Atomique et aux Energies Alternatives) and the Physics Lab of Ecole Normale Supérieure (LPENS)