A scale-free topological directional amplification is found in the Hatano-Nelson model with perturbed open boundaries, attributed to first-order boundary effects and characterized by a winding number on a continuous generalization of the finite-size Brillouin zone.
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Ab initio VDMC calculations of two-electron scattering in the uniform electron gas yield Landau parameters showing a density-driven underscreening-to-overscreening crossover and an sKO+ ansatz that quantitatively matches measured thermal resistivities in Al, Na, K, and Rb.
Spin-phonon coupling in Kitaev systems produces Fano lineshapes in Raman spectra whose temperature evolution and magnetic-field dependence encode the presence of Majorana fermions and Z2 gauge fluxes.
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Scale-Free Response with Directional Amplification in Critical Non-Hermitian Systems
A scale-free topological directional amplification is found in the Hatano-Nelson model with perturbed open boundaries, attributed to first-order boundary effects and characterized by a winding number on a continuous generalization of the finite-size Brillouin zone.
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Two-Electron Correlations in the Metallic Electron Gas
Ab initio VDMC calculations of two-electron scattering in the uniform electron gas yield Landau parameters showing a density-driven underscreening-to-overscreening crossover and an sKO+ ansatz that quantitatively matches measured thermal resistivities in Al, Na, K, and Rb.
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Footprints of the Kitaev spin liquid in the Fano lineshapes of the Raman active optical phonons
Spin-phonon coupling in Kitaev systems produces Fano lineshapes in Raman spectra whose temperature evolution and magnetic-field dependence encode the presence of Majorana fermions and Z2 gauge fluxes.