N-photon solutions to the two-qubit quantum Rabi model
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911903595364352 |
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| author | Lin, Qiang Tian, Junlong Tang, Pinghua Peng, Jie |
| author_facet | Lin, Qiang Tian, Junlong Tang, Pinghua Peng, Jie |
| contents | We studied the two-qubit quantum Rabi model and found its dark state solutions with at most N photons. One peculiar case presents when $N=3$, which has constant eigenenergy in the whole coupling regime and leads to level crossings within the same parity subspace. We also discovered asymptotic solutions with at most $N=2i+3$ $(i=1,2,3,\dots)$ photons, and constant eigenenergy $N\hbar ω$ when coupling $g$ becomes much larger than photon frequency $ω$. Although generally all photon number states are involved in the two-qubit quantum Rabi model, such $N$-photon solutions exist and may have applications in quantum information processing with ultrastrong couplings. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_02418 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | N-photon solutions to the two-qubit quantum Rabi model Lin, Qiang Tian, Junlong Tang, Pinghua Peng, Jie Quantum Physics We studied the two-qubit quantum Rabi model and found its dark state solutions with at most N photons. One peculiar case presents when $N=3$, which has constant eigenenergy in the whole coupling regime and leads to level crossings within the same parity subspace. We also discovered asymptotic solutions with at most $N=2i+3$ $(i=1,2,3,\dots)$ photons, and constant eigenenergy $N\hbar ω$ when coupling $g$ becomes much larger than photon frequency $ω$. Although generally all photon number states are involved in the two-qubit quantum Rabi model, such $N$-photon solutions exist and may have applications in quantum information processing with ultrastrong couplings. |
| title | N-photon solutions to the two-qubit quantum Rabi model |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2406.02418 |