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arXiv · 2609.25829

Strong coupling polarons in cavity quantum materials: limits of cavity-induced electron mass renormalization

D. M. Basko
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Abstract

Cavity-induced electron mass renormalization is an important ingredient of many proposals to control material properties through vacuum field modification. What is its ultimate limit? Here this question is answered by (i)~noting that this mass renormalization is essentially due to the field-mediated interaction between the electron and the polarizable degrees of freedom in the cavity mirrors, and (ii)~directly evaluating the corresponding Feynman path integral for a 2D electron by numerically exact quantum Monte Carlo. The sought upper limit is provided by the Landau-Pekar polaron in the planar geometry. The presented calculation bridges the gap between cavity control and dielectric engineering of material properties.

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D. M. Basko. 2026-09-22. Strong coupling polarons in cavity quantum materials: limits of cavity-induced electron mass renormalization. https://arxiv.org/abs/2609.25829

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