Engineering Ponderomotive Potential for Realizing $π$ and $π/2$ Bosonic Josephson Junctions
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866914108339650560 |
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| author | Lin, Jiadu Jiang, Qing-Dong |
| author_facet | Lin, Jiadu Jiang, Qing-Dong |
| contents | We study the ponderomotive potential of a bosonic Josephson junction periodically modulated by a high-frequency electromagnetic field. Within the small population difference approximation, the ponderomotive drive induces the well-known Kapitza pendulum effect, stabilizing a $π$-phase mode. We discuss the parameter dependence of the dynamical transition from macroscopic quantum self-trapping to $π$-Josephson oscillations. Furthermore, we examine the situation where the small population difference approximation fails. In this case, an essential momentum-shortening effect emerges, leading to a stabilized $π/2$-phase mode under certain conditions. By mapping this to a classical pendulum scenario, we highlight the uniqueness and limitations of the $π/2$-phase mode in bosonic Josephson junctions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_06619 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Engineering Ponderomotive Potential for Realizing $π$ and $π/2$ Bosonic Josephson Junctions Lin, Jiadu Jiang, Qing-Dong Quantum Gases Quantum Physics We study the ponderomotive potential of a bosonic Josephson junction periodically modulated by a high-frequency electromagnetic field. Within the small population difference approximation, the ponderomotive drive induces the well-known Kapitza pendulum effect, stabilizing a $π$-phase mode. We discuss the parameter dependence of the dynamical transition from macroscopic quantum self-trapping to $π$-Josephson oscillations. Furthermore, we examine the situation where the small population difference approximation fails. In this case, an essential momentum-shortening effect emerges, leading to a stabilized $π/2$-phase mode under certain conditions. By mapping this to a classical pendulum scenario, we highlight the uniqueness and limitations of the $π/2$-phase mode in bosonic Josephson junctions. |
| title | Engineering Ponderomotive Potential for Realizing $π$ and $π/2$ Bosonic Josephson Junctions |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2411.06619 |