Title: Detection of "nu=5/2" phases in the fractional quantum Hall effect

Speaker: Dr. Ankur Das, Weizmann Institute of Science, Rehovot, Israel

Abstract: The phases of the \nu=5/2 state are very elusive but one of the most interesting ones as it is proposed to contain Majorana modes with non-abelian statistics. There is more than one candidate for the non-abelian state, and among them the three most promising ones are the so-called pfaffian, anti-pfaffian, and particle-hole symmetric pfaffian states. Quite a few experiments later, the issue has not been settled. Previous efforts proposed methods to distinguish the candidates, including the proposals where the order can be determined by measuring both thermal conductances and shot noise on the same device [Park et al. PRL 125, 157702 (2020)] or by only measuring the unequilibrated electrical conductance [Yutushui et al. PRL 128, 016401 (2022)]. To avoid some of the experimental challenges and limitations of the proposals, including the above-mentioned ones, we propose a new device made out of interfaces of the \nu=5/2 state and Abelian states. We propose to measure electrical shot noise to resolve among these states.