WHY NORMAL FERMI SYSTEMS WITH SUFFICIENTLY SINGULAR INTERACTIONS DO NOT HAVE A SHARP FERMI-SURFACE

Authors
KOPIETZ P
Citation
P. Kopietz, WHY NORMAL FERMI SYSTEMS WITH SUFFICIENTLY SINGULAR INTERACTIONS DO NOT HAVE A SHARP FERMI-SURFACE, Journal of physics. A, mathematical and general, 28(22), 1995, pp. 571-576
Citations number
47
Categorie Soggetti
Physics
Journal title
Journal of physics. A, mathematical and general → ACNP
ISSN journal
03054470
Volume
28
Issue
22
Year of publication
1995
Pages
571 - 576
Database
ISI
SICI code
0305-4470(1995)28:22<571:WNFSWS>2.0.ZU;2-K
Abstract
We use a bosonization approach to show that the momentum distribution n(k) of normal Fermi systems with sufficiently singular interactions i s analytic in the vicinity of the non-interacting Fermi surface. These include singular density-density interactions that diverge in d dimen sions stronger than \q\(-2(d-1)) for vanishing momentum transfer q, bu t also fermions that are coupled to transverse gauge fields in d < 3.