Charge-Kondo effect mediated by repulsive interactions

摘要: We investigate the Kondo effect in a double quantum dot which is capacitively coupled to charge qubit. It shown that due this capacitive coupling, bare interdot repulsive interaction effectively reduced and eventually changed an attractive for strong couplings between By deriving low-energy effective Hamiltonian of system, we find dynamics system corresponding these two positive or negative regimes can be described, respectively, by isotropic orbital-Kondo anisotropic charge-Kondo Hamiltonian. Moreover, study various thermodynamic electronic transport properties using numerical renormalization group method.