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Auteurs principaux: Chen, Jing, Stoudenmire, E. Miles, Komijani, Yashar, Coleman, Piers
Format: Preprint
Publié: 2023
Sujets:
Accès en ligne:https://arxiv.org/abs/2302.09701
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author Chen, Jing
Stoudenmire, E. Miles
Komijani, Yashar
Coleman, Piers
author_facet Chen, Jing
Stoudenmire, E. Miles
Komijani, Yashar
Coleman, Piers
contents The Kondo lattice is one of the classic examples of strongly correlated electronic systems. We conduct a controlled study of the Kondo lattice in one dimension, highlighting the role of excitations created by the composite fermion operator. Using time-dependent matrix-product-state methods we compute various correlation functions and contrast them with both large-N mean-field theory and the strong-coupling expansion. We show that the composite fermion operator creates long-lived, charge-e and spin-1/2 excitations, which cover the low-lying single-particle excitation spectrum of the system. Furthermore, spin excitations can be thought to be composed of such fractionalized quasi-particles with a residual interaction which tend to disappear at weak Kondo coupling.
format Preprint
id arxiv_https___arxiv_org_abs_2302_09701
institution arXiv
publishDate 2023
record_format arxiv
spellingShingle Matrix Product Study of Spin Fractionalization in the 1D Kondo Insulator
Chen, Jing
Stoudenmire, E. Miles
Komijani, Yashar
Coleman, Piers
Strongly Correlated Electrons
The Kondo lattice is one of the classic examples of strongly correlated electronic systems. We conduct a controlled study of the Kondo lattice in one dimension, highlighting the role of excitations created by the composite fermion operator. Using time-dependent matrix-product-state methods we compute various correlation functions and contrast them with both large-N mean-field theory and the strong-coupling expansion. We show that the composite fermion operator creates long-lived, charge-e and spin-1/2 excitations, which cover the low-lying single-particle excitation spectrum of the system. Furthermore, spin excitations can be thought to be composed of such fractionalized quasi-particles with a residual interaction which tend to disappear at weak Kondo coupling.
title Matrix Product Study of Spin Fractionalization in the 1D Kondo Insulator
topic Strongly Correlated Electrons
url https://arxiv.org/abs/2302.09701