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VOLUME 57 (1993) | ISSUE 1 | PAGE 48
Anomalous orthogonality catastrophe for Luttinger liquid with repulsion
The orthogonality catastrophe for Luttinger liquid has been studied. Surprisingly, it was found that the backscattering from the external potential causes an enhancement of the infrared divergence for repulsive internal interaction and changes the singularity from the ordinary logarithmic to a power-law singularity.