Related Experiment Video
Updated: Aug 29, 2026

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy
Published on: August 13, 2019
Optical conductivity of the Fröhlich polaron
A S Mishchenko1, N Nagaosa, N V Prokof'ev
1CREST, Japan Science and Technology Agency (JST), AIST Tsukuba Central 4, Tsukuba 305-8562, Japan and Russian Research Center "Kurchatov Institute," 123182, Moscow, Russia.
Abstract:
We present accurate results for optical conductivity of the three dimensional Fröhlich polaron in all coupling regimes. The systematic-error free diagrammatic quantum Monte Carlo method is employed where the Feynman graphs for the momentum-momentum correlation function in imaginary time are summed up. The real-frequency optical conductivity is obtained by the analytic continuation with stochastic optimization. We compare numerical data with available perturbative and nonperturbative approaches to the optical conductivity and show that the picture of sharp resonances due to relaxed excited states in the strong-coupling regime is "washed out" by large broadening of these states. As a result, the spectrum contains only a single-maximum broad peak with peculiar shape and a shoulder.
More Related Videos
Related Concept Videos
Debye–Huckel–Onsager Conductance Equation
Dielectric Polarization in a Capacitor
Kohlraush’s Law and its Applications
Potential Due to a Polarized Object
Susceptibility, Permittivity and Dielectric Constant
Imperfections in Crystal Structure: Stoichiometric Point Defects

