Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2406.04114 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916542945427456 |
|---|---|
| author | Pooyan, Siamak Bauer, Dieter |
| author_facet | Pooyan, Siamak Bauer, Dieter |
| contents | It has been found previously that the presence or absence of topological edge states in the Su-Schrieffer-Heeger (SSH) model has a huge impact on harmonic generation spectra. More specifically, the yield of harmonics for harmonic orders that correspond to photon energies below the band gap is many orders of magnitude different in the trivial and topological phase. It is shown in this work that this effect is still present if electron-electron interaction is taken into account, i.e., if a Hubbard term is added to the SSH Hamiltonian. To that end, finite SSH-Hubbard chains at half filling are considered that are short enough to be accessible to exact diagonalization but already showing edge states in the topological phase. We show that the huge difference in the harmonic yield between the trivial and the topological phase can be reproduced with few-level models employing only the many-body ground state and a few excited many-body states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_04114 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Harmonic generation with topological edge states and electron-electron interaction Pooyan, Siamak Bauer, Dieter Quantum Physics Strongly Correlated Electrons Atomic Physics Optics It has been found previously that the presence or absence of topological edge states in the Su-Schrieffer-Heeger (SSH) model has a huge impact on harmonic generation spectra. More specifically, the yield of harmonics for harmonic orders that correspond to photon energies below the band gap is many orders of magnitude different in the trivial and topological phase. It is shown in this work that this effect is still present if electron-electron interaction is taken into account, i.e., if a Hubbard term is added to the SSH Hamiltonian. To that end, finite SSH-Hubbard chains at half filling are considered that are short enough to be accessible to exact diagonalization but already showing edge states in the topological phase. We show that the huge difference in the harmonic yield between the trivial and the topological phase can be reproduced with few-level models employing only the many-body ground state and a few excited many-body states. |
| title | Harmonic generation with topological edge states and electron-electron interaction |
| topic | Quantum Physics Strongly Correlated Electrons Atomic Physics Optics |
| url | https://arxiv.org/abs/2406.04114 |