Quantum 2025 – scientific programme

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MON: Monday Contributed Sessions

MON 11: Quantum Transport I

MON 11.5: Talk

Monday, September 8, 2025, 15:15–15:30, ZHG104

Andreev reflection and interferometry of integer quantum Hall edge states — •Tom Menei and Thomas L. Schmidt — Department of Physics and Materials Science, University of Luxembourg, Luxembourg

Recent experimental work has demonstrated the possibility of coupling superconductors (SCs) to quantum Hall (QH) systems at both integer and fractional filling factors. However, the theoretical modeling of such QH/SC interfaces remains challenging due to the strong magnetic fields required and the presence of disorder. In this work, we develop a theoretical framework based on QH edge state theory and incorporate realistic models of the superconductor to derive the effective coupling mechanisms at the interface. We analyze the resulting normal and Andreev reflection processes, as well as correlations probed through interference between multiple edge states across the QH/SC interface, and discuss their signatures in transport experiments.

Keywords: Quantum Hall effect; Andreev reflection; Electron interferometry