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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/2504.04819 |
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| _version_ | 1866913973902770176 |
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| author | Luo, Zhida Yang, Yurui Cui, Jiaxi Li, Wenjuan Lu, Miaoqian Guan, Xinzhou Hai, Wenhua Luo, Yunrong |
| author_facet | Luo, Zhida Yang, Yurui Cui, Jiaxi Li, Wenjuan Lu, Miaoqian Guan, Xinzhou Hai, Wenhua Luo, Yunrong |
| contents | We study the stability of spin dynamics for a spin-orbit (SO) coupled boson held in a driven non-Hermitian double-well potential. Under high-frequency approximation, we analytically derive the Floquet states and complex Floquet quasienergies of the system and reveal a striking parity-dependent stability criterion: when the ratio of the Zeeman field strength to the driving frequency $Ω/ω$ is even, stable spin dynamics can be achieved for \emph{arbitrary} SO coupling strength. However, when $Ω/ω$ is odd, stability requires the SO coupling strength to be integer or half-integer values. Particularly, we find four types of stability boundary lines for non-zero bias field strength, in sharp contrast to the commonly observed stability regions. These results establish a tunable parity-governed mechanism for stabilizing spin dynamics in non-Hermitian cold atomic systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_04819 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stability of spin dynamics for a spin-orbit coupled boson in a driven non-Hermitian double well Luo, Zhida Yang, Yurui Cui, Jiaxi Li, Wenjuan Lu, Miaoqian Guan, Xinzhou Hai, Wenhua Luo, Yunrong Quantum Gases We study the stability of spin dynamics for a spin-orbit (SO) coupled boson held in a driven non-Hermitian double-well potential. Under high-frequency approximation, we analytically derive the Floquet states and complex Floquet quasienergies of the system and reveal a striking parity-dependent stability criterion: when the ratio of the Zeeman field strength to the driving frequency $Ω/ω$ is even, stable spin dynamics can be achieved for \emph{arbitrary} SO coupling strength. However, when $Ω/ω$ is odd, stability requires the SO coupling strength to be integer or half-integer values. Particularly, we find four types of stability boundary lines for non-zero bias field strength, in sharp contrast to the commonly observed stability regions. These results establish a tunable parity-governed mechanism for stabilizing spin dynamics in non-Hermitian cold atomic systems. |
| title | Stability of spin dynamics for a spin-orbit coupled boson in a driven non-Hermitian double well |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2504.04819 |