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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2501.10997 |
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| _version_ | 1866910908773564416 |
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| author | Nian, Lei-Lei Wang, Yi-Cheng Wang, Jin-Yi Xiong, Long Zheng, Bo Lü, Jing-Tao |
| author_facet | Nian, Lei-Lei Wang, Yi-Cheng Wang, Jin-Yi Xiong, Long Zheng, Bo Lü, Jing-Tao |
| contents | Embedding quantum dot circuits into microwave cavities has emerged as a novel platform for controlling photon emission statistics by electrical means. With such a circuit version of the Rabi model, we reveal previously undefined quantum phase transitions in electrically driven lasing regimes, which do not require deep strong light-matter couplings. For one-photon interaction, the scaling analysis indicates that the system undergoes a continuous phase transition from thermal to coherent photon emissions. Going beyond this, a discontinuous quantum phase transition from superbunched to coherent states in two-photon processes, accompanied by the bistability within a mean-field theory, is predicted. Both the order of phase transitions and the critical electron-photon coupling can be easily controlled by an electric field, while the tunneling current can be used as a fingerprint of such transitions. Our prediction, along with its extension to multiphoton processes, represents a key step towards accessing lasing phase transitions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_10997 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dissipative quantum phase transitions in electrically driven lasers Nian, Lei-Lei Wang, Yi-Cheng Wang, Jin-Yi Xiong, Long Zheng, Bo Lü, Jing-Tao Mesoscale and Nanoscale Physics Embedding quantum dot circuits into microwave cavities has emerged as a novel platform for controlling photon emission statistics by electrical means. With such a circuit version of the Rabi model, we reveal previously undefined quantum phase transitions in electrically driven lasing regimes, which do not require deep strong light-matter couplings. For one-photon interaction, the scaling analysis indicates that the system undergoes a continuous phase transition from thermal to coherent photon emissions. Going beyond this, a discontinuous quantum phase transition from superbunched to coherent states in two-photon processes, accompanied by the bistability within a mean-field theory, is predicted. Both the order of phase transitions and the critical electron-photon coupling can be easily controlled by an electric field, while the tunneling current can be used as a fingerprint of such transitions. Our prediction, along with its extension to multiphoton processes, represents a key step towards accessing lasing phase transitions. |
| title | Dissipative quantum phase transitions in electrically driven lasers |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2501.10997 |