Sinusoidal magnetic field induced topological excitations in a spin-orbit coupled spinor condensate
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914958734786560 |
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| author | Saboo, Arpana Halder, Soumyadeep Das, Subrata Majumder, Sonjoy |
| author_facet | Saboo, Arpana Halder, Soumyadeep Das, Subrata Majumder, Sonjoy |
| contents | We explore topological excitations in a spin-1 Bose-Einstein condensate subjected to an in-plane sinusoidally varying magnetic field and Rashba spin-orbit coupling (SOC). In the absence of SOC, the periodic magnetic field induces vortex-anti-vortex structures in the $\ket{F=1, m_F=\pm1}$ condensates at saddle-points, such that the net topological charge remains zero. The introduction of Rashba SOC breaks the system's symmetry, leading to non-conservation of overall angular momentum in the spin-1 condensate. This anisotropy results in the emergence of certain skyrmion spin textures. We provide a comparative study for various in-plane magnetic field configurations while keeping the SOC strength constant. Our numerical simulations within the mean-field framework reveal the potential to engineer diverse topological excitations controlled by the interplay between spin-orbit coupling and in-plane magnetic field in a spinor condensate. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_08118 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sinusoidal magnetic field induced topological excitations in a spin-orbit coupled spinor condensate Saboo, Arpana Halder, Soumyadeep Das, Subrata Majumder, Sonjoy Quantum Gases We explore topological excitations in a spin-1 Bose-Einstein condensate subjected to an in-plane sinusoidally varying magnetic field and Rashba spin-orbit coupling (SOC). In the absence of SOC, the periodic magnetic field induces vortex-anti-vortex structures in the $\ket{F=1, m_F=\pm1}$ condensates at saddle-points, such that the net topological charge remains zero. The introduction of Rashba SOC breaks the system's symmetry, leading to non-conservation of overall angular momentum in the spin-1 condensate. This anisotropy results in the emergence of certain skyrmion spin textures. We provide a comparative study for various in-plane magnetic field configurations while keeping the SOC strength constant. Our numerical simulations within the mean-field framework reveal the potential to engineer diverse topological excitations controlled by the interplay between spin-orbit coupling and in-plane magnetic field in a spinor condensate. |
| title | Sinusoidal magnetic field induced topological excitations in a spin-orbit coupled spinor condensate |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2402.08118 |