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Originalpublikation
Frahm, H.; Schliemann, J.: Variational states for the spin-Peierls system. In: Physical Review B 56 (1997), Nr. 9, S. 5359-5365. DOI: https://doi.org/10.1103/PhysRevB.56.5359
We introduce a family of Jastrow pair product states for quasi-one-dimensional spin systems. Depending on a parameter they interpolate between the resonating valence-bond ground state of the Haldane-Shastry model describing a spin liquid and the (dimerized) valence-bond solid ground states of the Majumdar-Ghosh spin chain. These states are found to form an excellent basis for variational studies of Heisenberg chains with next-nearest-neighbor interactions and bond alternation as realized in the spin-Peierls system CuGeO3.
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