TY - JOUR
T1 - Exact dynamical structure factor of the degenerate haldane-shastry model
AU - Yamamoto, Takashi
AU - Saiga, Yasuhiro
AU - Arikawa, Mitsuhiro
AU - Kuramoto, Yoshio
PY - 2000
Y1 - 2000
N2 - The dynamical structure factor S(q, w) of the K-component (K = 2, 3, 4) spin chain with a 1/r2 interaction is derived exactly at zero temperature for the arbitrary size of the system. The result is interpreted in terms of a free quasiparticle picture which is a generalization of the spinon picture in the SU(2) case. The excited states consist of K quasiparticles each of which is characterized by a set of K − 1 quantum numbers. Divergent singularities of s(q, w) at the spectral edges are derived analytically. The analytic result is checked numerically for finite systems.
AB - The dynamical structure factor S(q, w) of the K-component (K = 2, 3, 4) spin chain with a 1/r2 interaction is derived exactly at zero temperature for the arbitrary size of the system. The result is interpreted in terms of a free quasiparticle picture which is a generalization of the spinon picture in the SU(2) case. The excited states consist of K quasiparticles each of which is characterized by a set of K − 1 quantum numbers. Divergent singularities of s(q, w) at the spectral edges are derived analytically. The analytic result is checked numerically for finite systems.
UR - http://www.scopus.com/inward/record.url?scp=0242384643&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0242384643&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.84.1308
DO - 10.1103/PhysRevLett.84.1308
M3 - Article
AN - SCOPUS:0242384643
VL - 84
SP - 1308
EP - 1311
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 6
ER -