Entropy transport through a superfluid quantum point contact: A Keldysh field-theory approach
The study investigates matter and entropy transport between two ultra-cold Fermi gas reservoirs connected by a quantum point contact under a chemical potential gradient within the BCS theory. It confirms standard particle current behavior while extending calculations to entropy current in the superconducting regime. The research reveals oscillatory behavior in the entropy current due to multiple Andreev reflections, suggesting richer subgap transport structures.