Phys. Rev. B 44, 12690–12700 (1991)Momentum distribution near k=3kF in the Tomonaga-Luttinger modelReceived 26 July 1991; published in the issue dated 15 December 1991 In contrast to normal Fermi liquids, where the momentum distribution n(k) has a discontinuous jump at k=kF, in Luttinger liquids a power-law singularity appears in n(k). It was argued that this singularity shows up not only at kF but at 3kF,5kF, . . . as well, and the anomaly exponent has been detemined for the one-dimensional Hubbard model using numerical methods or assuming conformal invariance. We present an exact calculation of the anomaly exponent for the Tomonaga-Luttinger model and compare it with the results for the Hubbard model. © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.44.12690
DOI:
10.1103/PhysRevB.44.12690
PACS:
71.10.+x, 05.30.Fk
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