Record deep-strong coupling (normalized ratio >1.6) realized in 3D Kane fermion Landau polaritons, with gauge-invariant theory showing emergent A² term that precludes superradiant quantum phase transition.
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Deep Strong light-matter Coupling in 3D Kane Fermions
Record deep-strong coupling (normalized ratio >1.6) realized in 3D Kane fermion Landau polaritons, with gauge-invariant theory showing emergent A² term that precludes superradiant quantum phase transition.