Mri-phy/p990308 Results from Bosonisation for Resonant Tunneling through a Quantum Dot in an Aharanov-bohm Ring

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. PACS numbers: 73.20 Dx, 73.40 Gk, 71.10 Pm 1 e-mail address: [email protected]. ernet.in 2 e-mail address: [email protected]