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Updated: Jun 26, 2025

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Quantum-Acoustical Drude Peak Shift
Joonas Keski-Rahkonen1,2, Xiaoyu Ouyang3,4, Shaobing Yuan4
1Department of Physics, Harvard University, Harvard University, Cambridge, Massachusetts 02138, USA.
Abstract:
Quantum acoustics-a recently developed framework parallel to quantum optics-establishes a nonperturbative and coherent treatment of the electron-phonon interaction in real space. The quantum-acoustical representation reveals a displaced Drude peak hiding in plain sight within the venerable Fröhlich model: the optical conductivity exhibits a finite frequency maximum in the far-infrared range and the dc conductivity is suppressed. Our results elucidate the origin of the high-temperature absorption peaks in strange or bad metals, revealing that dynamical lattice disorder steers the system towards a non-Drude behavior.
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