Polzer Steffen
University of Geneva, Rue du Conseil-Général 7-9, 1205 Geneva, Switzerland.
Lett Math Phys. 2023;113(4):90. doi: 10.1007/s11005-023-01711-w. Epub 2023 Aug 18.
We study the qualitative behaviour of the energy-momentum relation of the Fröhlich polaron at fixed coupling strength. Among other properties, we show that it is non-decreasing and that the correction to the quasi-particle energy is negative. We give a proof that the effective mass lies in that does not need the validity of a central limit theorem for the path measure.