Affiliation:
1. Center for Computational Quantum Physics
2. Zapata AI
3. Department of Physics
4. Center for Materials Theory
5. Hubbard Theory Consortium
Abstract
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 quasiparticles with a residual interaction which tend to disappear at weak Kondo coupling.
Published by the American Physical Society
2024
Funder
National Science Foundation
Publisher
American Physical Society (APS)
Cited by
3 articles.
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