
Researchers have shown that a single‑atom‑high step on a superconductor’s surface can act as a "quantum highway," directing vortex motion with a directional preference exceeding 1,000‑to‑1. This unprecedented control over quantum vortices promises to dramatically reduce energy loss in superconducting circuits and could enable a new generation of ultra‑efficient power transmission and quantum‑computing hardware. The finding builds on parallel work demonstrating that engineered quantum fluctuations can raise transition temperatures by up to 5.4% and that ultrashort electrical pulses can push superconductors to the edge of pair‑breaking, both of which highlight new knobs for tailoring superconducting properties. Looking ahead, researchers aim to combine atomic‑step engineering with vacuum‑field manipulation and spin‑based altermagnetism to create tunable, low‑loss superconductors for next‑generation electronics and quantum devices. [[1]]
