Ultrafast adiabatic passages in ultrastrongly coupled light-matter systems
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arXiv
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| Format: | Preprint |
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2022
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| _version_ | 1866911850046685184 |
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| author | Gao, Xun Duan, Liwei Tang, Pinghua Tian, Junlong Ren, Zhongzhou Solano, Enrique Peng, Jie |
| author_facet | Gao, Xun Duan, Liwei Tang, Pinghua Tian, Junlong Ren, Zhongzhou Solano, Enrique Peng, Jie |
| contents | We have obtained the solutions of the multimode quantum Rabi model when all modes have identical frequencies $ω$, including dark states $|ϕ_K\rangle$ with at least $K$ $(K=1,2,3,\ldots)$ photons. Extended to the multiqubit case, they lie close to another dark state $\vert ψ\rangle$ with at most one photon in the spectrum. Taking advantages of such solutions, we find a linear and symmetry-protected adiabatic passage through $\vert ψ\rangle$ to fast generate arbitrary single-photon $M$-mode $W$ states $\vert W_M\rangle$ with exactly the same speed. The effective minimum energy gap during the adiabatic evolution is further enlarged to $0.63ω$ when Stark shifts are included, such that arbitrary $\vert W_M\rangle$ can be ultrafast generated in $1.55\times 2πω^{-1}$ with fidelity $99\%$, indepedent of $M$. This work reveals the existence of linear ultrafast adiabatic passages in light-matter systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2207_00775 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Ultrafast adiabatic passages in ultrastrongly coupled light-matter systems Gao, Xun Duan, Liwei Tang, Pinghua Tian, Junlong Ren, Zhongzhou Solano, Enrique Peng, Jie Quantum Physics We have obtained the solutions of the multimode quantum Rabi model when all modes have identical frequencies $ω$, including dark states $|ϕ_K\rangle$ with at least $K$ $(K=1,2,3,\ldots)$ photons. Extended to the multiqubit case, they lie close to another dark state $\vert ψ\rangle$ with at most one photon in the spectrum. Taking advantages of such solutions, we find a linear and symmetry-protected adiabatic passage through $\vert ψ\rangle$ to fast generate arbitrary single-photon $M$-mode $W$ states $\vert W_M\rangle$ with exactly the same speed. The effective minimum energy gap during the adiabatic evolution is further enlarged to $0.63ω$ when Stark shifts are included, such that arbitrary $\vert W_M\rangle$ can be ultrafast generated in $1.55\times 2πω^{-1}$ with fidelity $99\%$, indepedent of $M$. This work reveals the existence of linear ultrafast adiabatic passages in light-matter systems. |
| title | Ultrafast adiabatic passages in ultrastrongly coupled light-matter systems |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2207.00775 |