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.
arXiv,preprint at arXiv:2501.10856 (2025)
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THz excitation induces ferroelectricity in PbTe via anharmonic phonon coupling and enables coherent double-pulse control of the induced polarization.
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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.
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Coherent seeding and control of dynamical ferroelectricity by phonon anharmonicity
THz excitation induces ferroelectricity in PbTe via anharmonic phonon coupling and enables coherent double-pulse control of the induced polarization.