Evidence for valence-bond pairing in a one-dimensional two-orbital system
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913930234822656 |
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| author | Mierzejewski, M. Dagotto, E. Herbrych, J. |
| author_facet | Mierzejewski, M. Dagotto, E. Herbrych, J. |
| contents | Valence bond (VB) states as the formation mechanism of Cooper pairs, eventually leading to high-temperature superconductivity, remain a controversial topic. Although various VB-like states find variational relevance in the description of specific spin models and quantum spin liquids, in the realm of many-body fermionic Hamiltonians, the evidence for such states as ground states wave functions remains elusive, challenging the valence-bond pairing mechanism. Here, we present evidence of a VB ground state with pairing tendencies, particularly at finite doping. We achieved this for the generic two-orbital Hubbard model in low dimension, where the VB states can be associated with the presence of the topological order manifested by edge states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_03771 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Evidence for valence-bond pairing in a one-dimensional two-orbital system Mierzejewski, M. Dagotto, E. Herbrych, J. Strongly Correlated Electrons Valence bond (VB) states as the formation mechanism of Cooper pairs, eventually leading to high-temperature superconductivity, remain a controversial topic. Although various VB-like states find variational relevance in the description of specific spin models and quantum spin liquids, in the realm of many-body fermionic Hamiltonians, the evidence for such states as ground states wave functions remains elusive, challenging the valence-bond pairing mechanism. Here, we present evidence of a VB ground state with pairing tendencies, particularly at finite doping. We achieved this for the generic two-orbital Hubbard model in low dimension, where the VB states can be associated with the presence of the topological order manifested by edge states. |
| title | Evidence for valence-bond pairing in a one-dimensional two-orbital system |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2411.03771 |