Ordered Electromagnetic Dissipation via Admittance Scaling.

A long-standing challenge in electromagnetic dissipative systems is that dissipation and phase evolution are fundamentally entangled through the underlying admittance dynamics, leading to oscillatory and path-dependent response trajectories under tuning. In this Letter, we identify an admittance-scaling mechanism that restructures the evolution pathway of the effective input admittance, enabling broadband dissipation control through magnitude scaling while maintaining an approximately invariant phase manifold. The resulting response evolution avoids the oscillatory behavior associated with conventional phase-mediated tuning and instead follows an ordered broadband trajectory. This admittance-scaling framework establishes a general route toward state-continuous manipulation of electromagnetic dissipation and tunable wave-control systems.