A Novel Non-Fermi Liquid Ground State in One Dimension

Details A Novel Non-Fermi Liquid Ground State in One Dimension A Novel Non-Fermi Liquid Ground State in One Dimension

2004-03-04

arxiv.org/abs/cond-mat/0403144v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 EPS fig

Scientific paper

We propose a new non-Fermi liquid ground state in one dimension that is not of the Luttinger type. It is the ground state of fermions interacting via a long range repulsive interaction in real space of the form $ V(x) = e^2/|x| $. We characterise it by computing the momentum distribution which is perfectly flat near the Fermi points signalling a radical departure from Luttinger liquid theory(and Fermi liquid theory). The dispersion of elementary excitations is found to be sublinear but gapless of the form $ v {} |q| {}[ Log[2k_{F}/|q| ]^{{1/2}} $. We also compute the conductance of a mesoscopic wire made of such objects and contrast it from the answer we obtain for a Luttinger wire.

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