Work performed within the research program of the Sonderforschungsbereich 341, Köln-Aachen-Jülich.
- Autor(in)
- Referenz
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- Seitenbereich
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0157 - 0163
- Schlagwort(e)
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<KWD>Quantum spin chains
Matrix-product ground states
Variational treatment
- Zusammenfsg.
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We study the phase diagram of the bilinear-biquadratic spin-1 chain. Using so-called matrix-product (MP) states we obtain upper bounds for the groundstate energy. The advantage of these MP states is their simplicity. Moreover they give an accurate description of the physics, especially in the Haldane phase.
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- Forschungsartikel