| Zugriffsnummer | 48263 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Bilinear-biquadratic spin-1 model in the Haldane and dimerized phases |
| Autor(in); Institution |
Rakov, Mykhailo V.; Department of Physics and Astronomy, Uppsala University, Uppsala, SWEDEN; Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh, UK
|
| Quelle/Jahr | Physical Review B: 105 (2022), 2, 1 - 5 |
| Artikelnummer | 024424 |
| ISSN | 2469-9950 (PRINT) ; 2469-9969 (ONLINE) |
| DOI | |
| Verlag | Melville, NY: American Physical Society (APS) |
| Freie Schlagworte | stronlgy-interacting systems ; Heisenberg model ; tensor renormalization method |
| Zusammenfassung | 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 θ = −π/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 |
| Themenbereich der Metrologie | Zeit und Frequenz |