{"paper":{"title":"Spin correlation functions and quasiparticle decay","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.str-el","authors_text":"Igor Poboiko, Mikhail Feigel'man","submitted_at":"2016-08-21T13:12:09Z","abstract_excerpt":"We study one-dimensional anisotropic XXZ spin-$\\frac12$ model with ferromagnetic sign of the coupling and $z-z$ exchange constant $J_z = \\Delta J$, where $\\Delta < 1$, and $J$ is the coupling within XY spin plane. We calculate damping of low-energy excitations with $\\omega \\ll T $ due to their scattering from thermal excitation bath with temperature $T \\ll J$, taking into account nonzero curvature of the excitation spectrum, $\\epsilon(q) = u q + \\delta\\epsilon(q)$. We calculate also longitudinal spin-spin correlation function $\\langle S^z(x,t)S^z(0,0) \\rangle$ at $x \\approx ut$ and find the sh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.05937","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}