Kondo and Dicke effect in quantum-dots side coupled to a quantum wire

Abstract

Electron tunneling through quantum-dots side coupled to a quantum wire, in equilibrium and nonequilibrium Kondo regime, is studied. The mean-field finite-$U$ slave-boson formalism is used to obtain the solution of the problem. We have found that the transmission spectrum shows a structure with two anti-resonances localized at the renormalized energies of the quantum dots. The DOS of the system shows that when the Kondo correlations are dominant there are two Kondo regimes with its own Kondo temperature. The above behavior of the DOS can be explained by quantum interference in the transmission through the two different resonance states of the quantum dots coupled to common leads. This result is analogous to the Dicke effect in optics. We investigate the many body Kondo states as a function of the parameters of the system.

5 figures. To appear in Phys. Rev. B

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• Suppression of Kondo screening by the Dicke effect in multiple quantum dots
• Finite-temperature conductance signatures of quantum criticality in double quantum dots
• Transport in Carbon Nanotubes: 2LSU(2) regime reveals subtle competition between Kondo and Intermediate Valence states
• Dicke-like effect in spin-polarized transport through coupled quantum dots
• Thermoelectric transport properties of a T-shaped double quantum dot system in the Coulomb blockade regime
• Spin-orbital and spin Kondo effects in parallel coupled quantum dots
• Interplay between electron pairing and Dicke effect in triple quantum dots structures
• Negative differential conductance induced by electronic correlation in a double quantum-dot molecule
• Non-local coupling of two donor-bound electrons
• Magnetic flux tuning of Fano-Kondo interplay in a parallel double quantum dot system
• Double-Fano resonance in a two-level quantum system coupled to zigzag Phosphorene nanoribbon
• Five and three quantum dot systems as apparatuses for measuring energy-levels
• Local Kondo temperatures in atomic chains
• Fano-Kondo and the Kondo-box regimes crossover in a quantum dot coupled to a quantum box
• Absolutely continuous energy bands and extended electronic states in an aperiodic comb-shaped nanostructure