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Current cross-correlation in the Anderson impurity model with exchange interaction
Current cross-correlation in the Anderson impurity model with exchange interaction
- Publication Year :
- 2018
-
Abstract
- We study spin-entanglement of the quasiparticles of the local Fermi liquid excited in nonlinear current through a quantum dot described by the Anderson impurity model with two degenerate orbitals coupled to each other via an exchange interaction. Applying the renormalized perturbation theory, we obtain the precise form of the cumulant generating function and cross-correlations for the currents with spin angled to arbitrary directions, up to third order in the applied bias voltage. It is found that the exchange interaction gives rise to spin-angle dependency in the cross-correlation between the currents through the two different orbitals, and also brings an intrinsic cross-correlation of currents with three different angular momenta.
- Subjects :
- Physics
Condensed Matter - Mesoscale and Nanoscale Physics
Degenerate energy levels
Exchange interaction
FOS: Physical sciences
Quantum entanglement
01 natural sciences
010305 fluids & plasmas
Quantum mechanics
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
Quasiparticle
Condensed Matter::Strongly Correlated Electrons
Fermi liquid theory
Perturbation theory
010306 general physics
Anderson impurity model
Spin-½
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....126f40290e028de140b7438179e3d058