Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-05-12
Physics
Condensed Matter
Strongly Correlated Electrons
19 pages, 10 figures
Scientific paper
10.1088/0305-4470/39/34/002
The exact one-to-one mapping between (spinless) Jordan-Wigner lattice fermions and (spin-1/2) spinons is established for all eigenstates of the one-dimensional s = 1=2 XX model on a lattice with an even or odd number N of lattice sites and periodic boundary conditions. Exact product formulas for the transition rates derived via Bethe ansatz are used to calculate asymptotic expressions of the 2-spinon and 4-spinon parts (for large even N) as well as of the 1-spinon and 3-spinon parts (for large odd N) of the dynamic spin structure factors. The observability of these spectral contributions is assessed for finite and infinite N.
Arikawa Mitsuhiro
Karbach Michael
Müller Gerhard
Wiele Klaus
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