Bilinear-biquadratic spin-1 model in the Haldane and dimerized phases
In: Physical Review B, Jg. 105 (2022), Heft 2
Online
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Zugriff:
We study the low-lying spectrum of the bilinear-biquadratic Heisenberg model in the dimerized and Haldane phases using a tensor renormalization method. At the critical point theta = -pi /4, the finite-size spectrum predicted by the Wess-Zumino-Witten (WZW) model can only partly be confirmed. We find a singlet-singlet gap which does not fit into the WZW systematics. The results obtained are compared to Bethe ansatz, exact diagonalization, and density-matrix renormalization group calculations for specific parameters.
Titel: |
Bilinear-biquadratic spin-1 model in the Haldane and dimerized phases
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Autor/in / Beteiligte Person: | Rakov, Mykhailo V. ; Weyrauch, Michael |
Link: | |
Zeitschrift: | Physical Review B, Jg. 105 (2022), Heft 2 |
Veröffentlichung: | 2022 |
Medientyp: | unknown |
DOI: | 10.1103/PhysRevB.105.024424 |
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