Superradiance and Cascade Transduction as Control Mechanisms in the MVC Topological Threshold: Helium-3 Vortex Stabilization and Coalescence-Driven Growth

We present a quant-ph-oriented control-and-inference formulation of the MVC hypothesis, in which a density-driven topological transition is triggered at the critical thresholdΛc ≡ ρloc/ρc = 1. The target scenario is extreme external energy injection into superfluid3He while preserving quantum coherence of selected low-energy degrees of freedom (modes,phases, or correlation observables). Two complementary mitigation channels are modeled:(i) superradiant pumping of rotating-vortex modes and (ii) cascade transduction of PeVscale photons into a broad, distributed drive with bounded peak local energy density. Anew element is an explicitly threshold-activated coalescence growth channel encoded by aneffective defect-size parameter S(t). We define operationally measurable observables (geometric phase and correlation transport) together with null-hypothesis tests and parameterestimation strategies that isolate the MVC-triggered contribution