The Junction That Remembers: Infrared Response of Two Coupled SYK Majorana Systems
The study investigates a dynamically opened Majorana junction formed by two coupled Sachdev–Ye–Kitaev (SYK) systems. By smoothly switching the coupling between them, researchers examine three distinct phenomena: information transfer, entanglement growth, and operator scrambling. The findings show that the opening converts simple transfer problems into complex many-body redistribution problems, revealing infrared memory amplified by soft frequencies.