1997/11/21 by Enrico Arrigoni · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.80.790
published as Phys. Rev. Lett. 80 (98) 790 · 4 pages, 3 ps figures. Accepted for publication in Phys. Rev. Lett
arxiv created 1997/11/21 · openalex publication_date 1998/01/26 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We analyze the problem of Luttinger liquids coupled via a single-particle hopping parameter t_\ensuremath⊥ and introduce a systematic diagrammatic expansion in powers of t_\ensuremath⊥. An analysis of the scaling of the diagrams at each order allows us to determine the power-law behavior versus t_\ensuremath⊥ of the interchain hopping and of the Fermi surface warp. In particular, for strong interactions, we find that the exponents are dominated by higher-order diagrams producing an enhanced coherence and a failure of linear-response theory. Our results are valid at any finite order in t_\ensuremath⊥ for the self-energy.