Supercurrent as a bulk probe for topological phase
The study proposes using supercurrent response as a bulk probe to distinguish between trivial and topological superconducting phases in one-dimensional nanowires. By observing non-monotonic behavior in superfluid stiffness as a function of chemical potential, the researchers show this signature is a necessary condition for the topological phase transition, offering an accessible alternative to methods relying on Majorana zero modes.