Passive scalars, random flux, and chiral phase fluids

Details Passive scalars, random flux, and chiral phase fluids Passive scalars, random flux, and chiral phase fluids

1995-09-11

arxiv.org/abs/cond-mat/9509057v1

Physics

Condensed Matter

use revtex, two-column, 4 pages, 5 postscript figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.76.1461

We study the two-dimensional localization problem for (i) a classical diffusing particle advected by a quenched random mean-zero vorticity field, and (ii) a quantum particle in a quenched random mean-zero magnetic field. Through a combination of numerical and analytic techniques we argue that both systems have extended eigenstates at a special point in the spectrum, $E_c$, where a sublattice decomposition obtains. In a neighborhood of this point, the Lyapunov exponents of the transfer-matrices acquire ratios characteristic of conformal invariance allowing an indirect determination of $1/r$ for the typical spatial decay of eigenstates.

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