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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.13657 |
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| _version_ | 1866917341273522176 |
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| author | Wang, Kang Chang, Wei-Xuan Bi, Cheng-Yu Cai, Zi Li, Zi-Xiang |
| author_facet | Wang, Kang Chang, Wei-Xuan Bi, Cheng-Yu Cai, Zi Li, Zi-Xiang |
| contents | In cavity quantum materials, entangling strongly correlated electrons with quantum light provides a unique opportunity to explore novel quantum phases and phase transitions absent in conventional solid-state materials. In this study, we develop a sign-problem-free fermion-photon hybrid Quantum Monte Carlo (QMC) algorithm, and use it to systematically investigate the ground-state phase diagram of a two-dimensional cavity Hubbard model. It is shown that the interplay between the electron correlation and photon condensation gives rise to intriguing quantum phases ({\it e.g.} superradiant antiferromagnetic and chiral/$π$-flux states), and different quantum phase transitions, such as a first-order superradiant phase transition and a continuous phase transition with Gross-Neveu universality class. The methodology can be readily generalized to more complicated cavity strongly correlated models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_13657 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Superradiant strongly correlated quantum states in cavity Hubbard model Wang, Kang Chang, Wei-Xuan Bi, Cheng-Yu Cai, Zi Li, Zi-Xiang Strongly Correlated Electrons In cavity quantum materials, entangling strongly correlated electrons with quantum light provides a unique opportunity to explore novel quantum phases and phase transitions absent in conventional solid-state materials. In this study, we develop a sign-problem-free fermion-photon hybrid Quantum Monte Carlo (QMC) algorithm, and use it to systematically investigate the ground-state phase diagram of a two-dimensional cavity Hubbard model. It is shown that the interplay between the electron correlation and photon condensation gives rise to intriguing quantum phases ({\it e.g.} superradiant antiferromagnetic and chiral/$π$-flux states), and different quantum phase transitions, such as a first-order superradiant phase transition and a continuous phase transition with Gross-Neveu universality class. The methodology can be readily generalized to more complicated cavity strongly correlated models. |
| title | Superradiant strongly correlated quantum states in cavity Hubbard model |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2603.13657 |