Boson decay and the dynamical structure factor for the XXZ chain at finite magnetic field

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dc.creatorSirker, J.
dc.creatorPereira, R. G.
dc.creatorCaux, J. -S.
dc.creatorHagemans, R.
dc.creatorMaillet, J. M.
dc.creatorWhite, S. R.
dc.creatorAffleck, I.
dc.date2007-05-23
dc.date.accessioned2026-07-07T09:23:56Z
dc.date.available2026-07-07T09:23:56Z
dc.descriptionWe study the longitudinal dynamical structure factor $S^{zz}(q,ω)$ for the anisotropic spin-1/2 (XXZ) chain at finite magnetic field using bosonization. The leading irrelevant operators in the effective bosonic model stemming from band curvature describe boson decay processes and lead to a high-frequency tail and a finite width $γ_q$ of the on-shell peak for $S^{zz}(q,ω)$. We use the Bethe ansatz to show that $γ_q\sim q^2$ for $q\ll 1$ and to calculate the amplitudes of the leading irrelevant operators in the effective field theory.
dc.description2 pages, 2 figures, proceedings SCES '07, Houston
dc.identifierhttps://arxiv.org/abs/0705.3312
dc.identifierhttp://arxiv.org/abs/0705.3312
dc.identifierPhysica B 403, 1520 (2008)
dc.identifierdoi:10.1016/j.physb.2007.10.304
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155918
dc.subjectStrongly Correlated Electrons
dc.titleBoson decay and the dynamical structure factor for the XXZ chain at finite magnetic field
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