In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator
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arXiv
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| Format: | Preprint |
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2022
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| _version_ | 1866916244269039616 |
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| author | Osterkorn, Alexander Meyer, Constantin Manmana, Salvatore R. |
| author_facet | Osterkorn, Alexander Meyer, Constantin Manmana, Salvatore R. |
| contents | Periodically driven quantum many-body systems host unconventional behavior not realized at equilibrium. Here we investigate such a setup for strongly interacting spinless fermions on a chain, which at zero temperature and strong interactions form a charge density wave insulator. Using unbiased numerical matrix product state methods for time-dependent spectral functions, we find that driving of the correlated charge-density wave insulator leads not only to a renormalization of the excitation spectrum as predicted by an effective Floquet Hamiltonian, but also to a cosine-like in-gap feature. This is not obtained for a charge density wave model without interactions. A mean-field treatment provides a partial explanation in terms of doublon excitations. However, the full picture needs to take into account strong correlation effects. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2205_09557 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator Osterkorn, Alexander Meyer, Constantin Manmana, Salvatore R. Strongly Correlated Electrons Quantum Physics Periodically driven quantum many-body systems host unconventional behavior not realized at equilibrium. Here we investigate such a setup for strongly interacting spinless fermions on a chain, which at zero temperature and strong interactions form a charge density wave insulator. Using unbiased numerical matrix product state methods for time-dependent spectral functions, we find that driving of the correlated charge-density wave insulator leads not only to a renormalization of the excitation spectrum as predicted by an effective Floquet Hamiltonian, but also to a cosine-like in-gap feature. This is not obtained for a charge density wave model without interactions. A mean-field treatment provides a partial explanation in terms of doublon excitations. However, the full picture needs to take into account strong correlation effects. |
| title | In-Gap Band Formation in a Periodically Driven Charge Density Wave Insulator |
| topic | Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2205.09557 |