Results from bosonisation for resonant tunneling through a quantum dot in an Aharanov-Bohm ring

Details Results from bosonisation for resonant tunneling through a quantum dot in an Aharanov-Bohm ring Results from bosonisation for resonant tunneling through a quantum dot in an Aharanov-Bohm ring

1999-09-29

arxiv.org/abs/cond-mat/9909417v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Latex, 9 pages, 1 figure; to appear in Phys. Rev. B

Scientific paper

We study coherent charge tunneling through a one-dimensional interacting ring with a one-dimensional quantum dot embedded in one of its arms through bosonisation. The symmetries of the effective action explain many of the features such as phase change between resonances, in-phase successive resonances and phase-locking, which have been observed in experiments of coherent transport in mesoscopic rings, with a quantum dot. We also predict changes in the behaviour of the tunneling conductance in the presence of an Aharanov-Bohm flux through the ring. We argue that these results hold true in general for any dot.

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