Spectral functions in one-dimensional quantum systems at finite temperature using the density matrix renormalization group
- We present time-dependent density matrix renormalization group simulations (t-DMRG) at finite temperatures. It is demonstrated how a combination of finite-temperature t-DMRG and time-series prediction allows for an easy and very accurate calculation of spectral functions in one-dimensional quantum systems, irrespective of their statistics for arbitrary temperatures. This is illustrated with spin structure factors of XX and XXX spin-1/2 chains. For the XX model we can compare against an exact solution, and for the XXX model (Heisenberg antiferromagnet) against a Bethe ansatz solution and quantum Monte Carlo data.
| Verfasserangaben: | Thomas Barthel, Ulrich Schollwock, Steven R. White |
|---|---|
| URL: | http://prb.aps.org/ |
| DOI: | https://doi.org/10.1103/Physrevb.79.245101 |
| ISSN: | 1098-0121 |
| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Jahr der Erstveröffentlichung: | 2009 |
| Erscheinungsjahr: | 2009 |
| Datum der Freischaltung: | 25.03.2017 |
| Quelle: | Physical review B. - ISSN 1098-0121. - 79 (2009), 24, Art. 245101 |
| Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Peer Review: | Referiert |
