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Many-body correlations in Floquet steady states: Frequency-resolved renormalization group of the driven Anderson impurity

Jan-Niklas Herre1,*, Christoph Karrasch2, and Dante M. Kennes1,3

  • *Contact author: jan.herre@rwth-aachen.de
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Phys. Rev. B 114, 055113 – Published 10 July, 2026

DOI: https://doi.org/10.1103/693m-tklt

Abstract

We introduce a functional renormalization group framework formulated directly in the Floquet steady state that systematically incorporates frequency-dependent interaction effects. By retaining the frequency structure of the two-particle vertex up to second order in interaction strength, our approach provides controlled access to dynamical response functions and nonequilibrium transport in driven, interacting systems. Using the periodically driven single-impurity Anderson model as a paradigmatic example, we benchmark our results against state-of-the-art Floquet Green's function methods and find quantitative agreement for finite-frequency observables up to intermediate interaction strengths. Remarkably, we also show that static properties are often captured reliably by much simpler approximations, suggesting practical pathways for modeling driven quantum materials. Finally, we demonstrate that although periodic driving of the dot strongly broadens the Kondo resonance through inelastic scattering, it leaves the many-body Kondo cloud largely intact. This robustness suppresses Floquet replicas of the Kondo peak and leads to a partial persistence of Kondo pinning, highlighting the resilience of emergent many-body correlations under local periodic driving.

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Phys. Rev. B 114, 055113– Published 10 July, 2026
  • Received 16 March 2026
  • Revised 10 June 2026
  • Accepted 16 June 2026
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