Many-body wavefunctions for quantum impurities out of equilibrium. II. Charge fluctuations

We extend the general formalism discussed in the previous paper (A. B. Culver and N. Andrei, [Phys. Rev. B 103, 195106 (2021)]) to two models with charge fluctuations: the interacting resonant level model and the Anderson impurity model. In the interacting resonant level model, we find the exact tim...

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Published in:Physical review. B 2021-05, Vol.103 (19), p.1, Article 195107
Main Authors: Culver, Adrian B., Andrei, Natan
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Language:English
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Impurities
Occupancy
Perturbation theory
Steady state
Wave functions
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description We extend the general formalism discussed in the previous paper (A. B. Culver and N. Andrei, [Phys. Rev. B 103, 195106 (2021)]) to two models with charge fluctuations: the interacting resonant level model and the Anderson impurity model. In the interacting resonant level model, we find the exact time-evolving wavefunction and calculate the steady-state impurity occupancy to leading order in the interaction. In the Anderson impurity model, we find the nonequilibrium steady state for small or large Coulomb repulsion U , and we find that the steady-state current to leading order in U agrees with a Keldysh perturbation theory calculation.
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Occupancy
Perturbation theory
Steady state
Wave functions
title Many-body wavefunctions for quantum impurities out of equilibrium. II. Charge fluctuations
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