2018/05/14 by Tilman Enss, Joseph H. Thywissen · 1 citation
Chemistry · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Cold Atom Physics and Bose-Einstein Condensates #Degenerate energy levels #Fermion #Lattice (music) #Quantum #Quantum and electron transport phenomena #Quasiparticle #Spinon #Spins #Unitary state #cond-mat.quant-gas #cond-mat.str-el
paper · pdf · doi:10.1146/annurev-conmatphys-031218-013732
published as Annu. Rev. Condens. Matter Phys. 10, 85-106 (2019) · 24 pages, 4 figures, invited review for Ann. Rev. Cond. Mat. Phys
arxiv created 2018/05/14 · openalex created_date 2018/06/01 · openalex publication_date 2018/11/28 · arxiv updated 2019/03/13 · openalex updated_date 2026/08/06
We review recent advances in experimental and theoretical understanding of spin transport in strongly interacting Fermi gases. The central new phenomenon is the observation of a lower bound on the (bare) spin diffusivity in the strongly interacting regime. Transport bounds are of broad interest for the condensed matter community, with a conceptual similarity to observed bounds in shear viscosity and charge conductivity. We discuss the formalism of spin hydrodynamics, how dynamics are parameterized by transport coefficients, the effect of confinement, the role of scale invariance, the quasiparticle picture, and quantum critical transport. We conclude by highlighting open questions, such as precise theoretical bounds, relevance to other phases of matter, and extensions to lattice systems.