2011/01/12 by Antoine Klauser, Jorn Mossel, Jean-Sébastien Caux +2
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Physics of Superconductivity and Magnetism #Quantum many-body systems #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.106.157205
published as Phys. Rev. Lett. 106, 157205 (2011) · 4 pages, 4 figures
arxiv created 2011/01/12 · openalex publication_date 2011/04/13 · arxiv updated 2012/12/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We determine the spin-exchange dynamical structure factor of the Heisenberg spin chain, as is measured by indirect resonant inelastic x-ray scattering (RIXS). We find that two-spin RIXS excitations nearly entirely fractionalize into two-spinon states. These share the same continuum lower bound as single-spin neutron scattering excitations, even if the relevant final states belong to orthogonal symmetry sectors. The RIXS spectral weight is mainly carried by higher-energy excitations, and is beyond the reach of the low-energy effective theories of Luttinger liquid type.