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cond-mat1998
Exact four-spinon dynamical correlation function in isotropic Heisenberg model
A. Abada, A. H. Bougourzi, S. Seba +1
We discuss some properties of the exact four-spinon dynamical correlation function in the antiferromagnetic spin 1/2 -model, the expression of which we derived recently.…
cond-mat1993
Two-Phonon States in Alkali-Metal Clusters
Abdellatif Abada, Dominique Vautherin
Two phonon-states of alkali-metal clusters (treated as jellium spheres) are calculated by using a method based on a perturbative construction of periodic orbits of the time-depende…