Quantum transport in an environment parametrized by dispersive bosons
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866913308094758912 |
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| author | Chakraborty, Monodeep Fehske, Holger |
| author_facet | Chakraborty, Monodeep Fehske, Holger |
| contents | We generalize the two-channel (Edwards) fermion-boson model describing quantum transport in a background medium to the more realistic case of dispersive bosons. Using the variational exact diagonalization technique, we numerically solve the extended model in a one-dimensional setting, for both downward and upward curved boson dispersion, and show that going away from the previous Einstein-boson assumption has profound consequences for the particle transport. Specifically, we analyze the ground-state and spectral properties and demonstrate the renormalization of the particle's coherent band, effective mass, photoemission spectra and fermion-boson correlation functions due to the interplay of fluctuations and correlations in a dispersive environment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_14776 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Quantum transport in an environment parametrized by dispersive bosons Chakraborty, Monodeep Fehske, Holger Quantum Gases Strongly Correlated Electrons We generalize the two-channel (Edwards) fermion-boson model describing quantum transport in a background medium to the more realistic case of dispersive bosons. Using the variational exact diagonalization technique, we numerically solve the extended model in a one-dimensional setting, for both downward and upward curved boson dispersion, and show that going away from the previous Einstein-boson assumption has profound consequences for the particle transport. Specifically, we analyze the ground-state and spectral properties and demonstrate the renormalization of the particle's coherent band, effective mass, photoemission spectra and fermion-boson correlation functions due to the interplay of fluctuations and correlations in a dispersive environment. |
| title | Quantum transport in an environment parametrized by dispersive bosons |
| topic | Quantum Gases Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2311.14776 |