Hierarchic superradiant phases in anisotropic Dicke model
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866910024807219200 |
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| author | He, D. K. Song, Z. |
| author_facet | He, D. K. Song, Z. |
| contents | We revisit the phase diagram of an anisotropic Dicke model by revealing the non-analyticity induced by underlying exceptional points. We find that, from a dynamical perspective, the conventional superradiant phase can be further separated into three regions, in which the systems are characterized by different effective Hamiltonians, including the harmonic oscillator, the inverted harmonic oscillator, and their respective counterparts. We employ the Loschmidt echo to characterize different quantum phases by analyzing the quench dynamics of a trivial initial state. Numerical simulations for finite systems confirm our predictions about the existence of hierarchic superradiant phases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_21169 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hierarchic superradiant phases in anisotropic Dicke model He, D. K. Song, Z. Quantum Physics Strongly Correlated Electrons We revisit the phase diagram of an anisotropic Dicke model by revealing the non-analyticity induced by underlying exceptional points. We find that, from a dynamical perspective, the conventional superradiant phase can be further separated into three regions, in which the systems are characterized by different effective Hamiltonians, including the harmonic oscillator, the inverted harmonic oscillator, and their respective counterparts. We employ the Loschmidt echo to characterize different quantum phases by analyzing the quench dynamics of a trivial initial state. Numerical simulations for finite systems confirm our predictions about the existence of hierarchic superradiant phases. |
| title | Hierarchic superradiant phases in anisotropic Dicke model |
| topic | Quantum Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2505.21169 |