Non-fermi liquid as passive scalar fluid

Details Non-fermi liquid as passive scalar fluid Non-fermi liquid as passive scalar fluid

1999-06-25

arxiv.org/abs/cond-mat/9906398v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revised presentation; typographical errors corrected; no change in content

Scientific paper

I suggest that electron localization by random flux and passive transport in quenched velocity fields in two dimensions be studied as perturbations of the simple operator ${\cal K}={\bf A} \cdot \nabla$, with incompressible velocity field/vector potential ${\bf A}=\nabla \times \phi=(-\partial_y,\partial_x)\phi$. This operator has an infinitely degenerate subspace of zero energy eigenstates, arising from incompressibility, that are {\it extended} for generic $\phi({\bf x})$ and are expected to remain so under perturbation. I propose that an anomaly accounts qualitatively for properties of the spectrum and eigenstates of ${\cal K}$ and its perturbations.

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