Karyn Le Hur

Probing spin and orbital kondo effects with a mesoscopic interferometer

We investigate theoretically the transport properties of a closed Aharonov-Bohm interferometer containing two quantum dots in the strong coupling regime. We find two distinct physical scenarios depending on the strength of the interdot Coulomb interaction. When the interdot Coulomb interaction is negligible only spin fluctuations are important and each dot develops a Kondo resonance at the Fermi level independently of the applied magnetic flux. The transport is characterized by the interference of these two independent Kondo resonances. On the contrary, for large interdot interaction, only one electron can be accommodated onto the double dot system. In this situation, not only the spin can fluctuate but also the orbital degree of freedom (the pseudo-spin). As a result, we find different ground states depending on the value of the applied flux. When

Unification of electromagnetic noise and Luttinger liquid via a quantum dot

phi=pi

Coulomb drag between two spin incoherent Luttinger liquids

(mod

Maximized orbital and spin Kondo effects in a single-electron transistor

2pi

Transport in a spin-incoherent Luttinger liquid

) (

Mesoscopic resonating valence bond system on a triple dot.

phi=2piPhi/Phi_0

Decoherence of Einstein-Podolsky-Rosen pairs in a noisy Andreev entangler

, where

Fractional plateaus in the Coulomb blockade of coupled quantum dots

Phi

Heavy electrons from Hund’s rule and short-range antiferromagnetism

is applied flux, and

Quantum dot sandwiched between anomalous metals with a pseudogap.

Phi_0=h/e