Hyperelliptic curves for multi-channel quantum wires and the multi-channel Kondo problem

Details Hyperelliptic curves for multi-channel quantum wires and the multi-channel Kondo problem Hyperelliptic curves for multi-channel quantum wires and the multi-channel Kondo problem

1998-09-18

arxiv.org/abs/cond-mat/9809259v1

Phys.Rev. B60 (1999) 11432

Physics

Condensed Matter

Statistical Mechanics

7 pages, 1 figure, revtex

Scientific paper

10.1103/PhysRevB.60.11432

We study the current in a multi-channel quantum wire and the magnetization in the multi-channel Kondo problem. We show that at zero temperature they can be written simply in terms of contour integrals over a (two-dimensional) hyperelliptic curve. This allows one to easily demonstrate the existence of weak-coupling to strong-coupling dualities. In the Kondo problem, the curve is the same for under- and over-screened cases; the only change is in the contour.

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