Theory of Nonlinear Diffusion with a Physical Gapped Mode

Abbasi, Navid; Kaminski, Matthias; Tavakol, Omid

doi:10.1103/PhysRevLett.132.131602

Title: Theory of Nonlinear Diffusion with a Physical Gapped Mode

Journal Article · 28 March 2024 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.132.131602 · OSTI ID:2331316

Abbasi, Navid;

;

In a system with one conserved charge the charge diffusion is modified by nonlinear self-interactions within an effective field theory (EFT) of diffusive fluctuations. We include the slowest ultraviolet (UV) mode, constructing a UV-regulated EFT. The relaxation time of this UV mode is protected from renormalization, as supported by experimental data in a bad metal system. Furthermore, the retarded density-density Green’s function acquires four branch points, eventually increasing the range of applicability. We discuss the fate of long time tails as well as implications for the quark gluon plasma. Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0012447

OSTI ID:: 2331316

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 132; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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