Series Expansions for Excited States of Quantum Lattice Models

Details Series Expansions for Excited States of Quantum Lattice Models Series Expansions for Excited States of Quantum Lattice Models

1995-07-31

arxiv.org/abs/cond-mat/9507138v2

Physics

Condensed Matter

9 pages, no figures, Revtex 3.0 The revised version corrects the incorrect (and unnecessary) statement in the original that H

Scientific paper

10.1016/0038-1098(96)00051-8

We show that by means of connected-graph expansions one can effectively generate exact high-order series expansions which are informative of low-lying excited states for quantum many-body systems defined on a lattice. In particular, the Fourier series coefficients of elementary excitation spectra are directly obtained. The numerical calculations involved are straightforward extensions of those which have already been used to calculate series expansions for ground-state correlations and $T=0$ susceptibilities in a wide variety of models. As a test, we have reproduced the known elementary excitation spectrum of the transverse-field Ising chain in its disordered phase.

Affiliated with

Also associated with

No associations

Rating

Series Expansions for Excited States of Quantum Lattice Models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Series Expansions for Excited States of Quantum Lattice Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Series Expansions for Excited States of Quantum Lattice Models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-365477