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Paper detail

A level coupled to a 1D interacting reservoir : A DMRG study

The influence of interactions in a reservoir coupled to a level on the width of the filling as a function of the chemical potential and the position of the level is studied. The density matrix renormalization group (DMRG) method is used to calculate the ground state of a finite-size interacting reservoir, linked to a single state dot. The influence of the interactions in the lead as well as dot-lead interactions is considered. It is found that interactions in the reservoir result in a decrease in the resonance width, while the dot-lead interaction has an opposite effect. These effects are explained within the random phase approximation as an effective change in the inverse compressibility of the reservoir, while the dot-lead interactions renormalize the position of the level.

preprint2004arXivOpen access
M. SadeY. WeissM. GoldsteinR. Berkovits
cond-mat.mes-hall
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M. SadeY. WeissM. GoldsteinR. Berkovits

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