We explore the Kondo effect incorporating localized impurity transforming under generic symmetry group G, that we call G-Kondo effect. derive one-dimensional effective model coupled with impurity, and studied thermodynamic properties based on boundary conformal field theory approach. in particular study entropy at fixed point, low temperature behavior of specific heat susceptibility. also consi...

The linear and nonlinear transport properties of the single-electron transistor at the degeneracy point are investigated for the case of weak single-mode tunnel junctions. Two opposing scenarios are considered, distinguished by whether or not electrons can propagate coherently between the two tunnel junctions. Each of these two scenarios corresponds to the realization of a different multichanne...

We show a detailed investigation of the split Kondo effect in a carbon nanotube quantum dot with multiple gate electrodes. Two conductance peaks, observed at finite bias in nonlinear transport measurements, are found to approach each other for increasing magnetic field, to result in a recovered zero bias Kondo resonance at finite magnetic field. Surprisingly, in the same charge state, but under...

PACS. 71.10.Ay – Fermi-liquid theory and other phenomenological models. Abstract. – By combining exact diagonalization with scaling method, we show that it is possible to realize two channel spin 1 2 Kondo (2CK) conductance in a quantum dot at Coulomb Blockade, with an odd number of electrons and with contacts in a pillar configuration, as an applied orthogonal magnetic field B is tuned at an a...

Multiple conduction channels interacting with a quantum impurity -- spin in the conventional ``multi-channel Kondo effect'' or topological mesoscopic device (``topological effect'') has been proposed as platform to realize anyonic quasi-particles. However, above implementations require either perfect channel symmetry use of Majorana fermions. Here we propose Majorana-free setup which implements...