Violation of the viscosity/entropy bound in translationally invariant non-Fermi liquids

2018/10/31 by Xian-Hui Ge, Shao-Kai Jian, Yi-Li Wang +2
Physics and Astronomy · #Black Holes and Theoretical Physics #Entropy (arrow of time) #Invariant (physics) #Kullback–Leibler divergence #Pulsars and Gravitational Waves Research #Quantum many-body systems #Shear viscosity #Upper and lower bounds #Viscosity #cond-mat.str-el #gr-qc #hep-th

paper · pdf · doi:10.1103/physrevresearch.2.023366

published as Phys. Rev. Research 2, 023366 (2020) · 10 pages, 2 figures; more details added as appendix; and minor corrections

openalex created_date 2019/04/25 · arxiv created 2020/04/06 · openalex publication_date 2020/06/19 · arxiv updated 2020/07/01 · openalex updated_date 2026/08/05

Abstract

The authors study a two-dimensional strongly-correlated solvable model consisting of coupled Sachdev-Ye-Kitaev islands and show that at large N limit, the shear viscosity to entropy density ratio violates the Kovtun-Son-Starinets bound in a robust temperature window.

Citations

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