Spectral sum rules for the Tomonaga-Luttinger model

Details Spectral sum rules for the Tomonaga-Luttinger model Spectral sum rules for the Tomonaga-Luttinger model

1993-05-19

arxiv.org/abs/cond-mat/9305022v1

Physics

Condensed Matter

9 pages, REVTEX 3.0, 2 figures added as postscript files

Scientific paper

10.1103/PhysRevB.48.11390

In connection with recent publications we discuss spectral sum rules for the Tomonaga-Luttinger model without using the explicit result for the one-electron Green's function. They are usefull in the interpretation of recent high resolution photoemission spectra of quasi-one-dimensional conductors. It is shown that the limit of infinite frequency and band cut\-off do not commute. Our result for arbitrary shape of the interaction potential generalizes an earlier discussion by Suzumura. A general analytical expression for the spectral function for wave vectors far from the Fermi wave vector $k_{F}$ is presented. Numerical spectra are shown to illustrate the sum rules.

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