Black-Hole Analogs in Quantum-Hall–Superconductor Hybrids

Interfaces between quantum Hall (QH) systems and superconductors (SC) provide a solid-state platform where transport phenomena mirror black-hole physics. In the lowest Landau level, the saddle potential induced by a quantum point contact (QPC) leads to a scattering matrix that exhibits resonant modes analogous to black-hole quasinormal modes and produces a thermal-like (Hawking-Unruh) distribution. We broaden this analogy to include QH-SC interfaces, where Andreev reflection results in distinct electron and hole channels that play the role of particle-antiparticle pairs created across an event horizon. We derive the scattering properties of the interface, identify the quasinormal modes, and connect the effective temperature and entropy to the underlying area law. These results suggest experimentally accessible black-hole analogs in mesoscopic hybrid systems.