2017/09/05 by Chi-Fang Chen, Andrew Lucas · 36 citations
Earth and Planetary Sciences · Physics and Astronomy · #Acoustics #Black Holes and Theoretical Physics #Brane #Holography #Optics #Philosophy #Physics #Quantum mechanics #Seismic Imaging and Inversion Techniques #Seismic Waves and Analysis #Sound (geography) #Theoretical physics #Zero (linguistics) #Zero sound #cond-mat.str-el #hep-th
paper · pdf · doi:10.1016/j.physletb.2017.10.023
published in Physics Letters B 774, 569-574 (Elsevier BV) · 11 pages
arxiv created 2017/09/05 · openalex publication_date 2017/10/16 · arxiv updated 2017/10/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
At zero temperature, the charge current operator appears to be conserved, within linear response, in certain holographic probe brane models of strange metals. At small but finite temperature, we analytically show that the weak non-conservation of this current leads to both a collective “zero sound” mode and a Drude peak in the electrical conductivity. This simultaneously resolves two outstanding puzzles about probe brane theories. The nonlinear dynamics of the current operator itself appears qualitatively different.