Spectral functions in one-dimensional quantum systems at finite temperature using the density matrix renormalization group

Journal Article

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. © 2009 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Barthel, T; Schollwöck, U; White, SR

Published Date

  • June 1, 2009

Published In

Volume / Issue

  • 79 / 24

Electronic International Standard Serial Number (EISSN)

  • 1550-235X

International Standard Serial Number (ISSN)

  • 1098-0121

Digital Object Identifier (DOI)

  • 10.1103/PhysRevB.79.245101

Citation Source

  • Scopus