Spatiotemporal Bloch states of a spin–orbit coupled Bose–Einstein condensate in an optical lattice |
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引用本文: | 魏娅雯,孔超,海文华.Spatiotemporal Bloch states of a spin–orbit coupled Bose–Einstein condensate in an optical lattice[J].中国物理 B,2019(5):249-255. |
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作者姓名: | 魏娅雯 孔超 海文华 |
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作者单位: | Department of Physics and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education |
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基金项目: | Project supported by the National Natural Science Foundation of China(Grant No.11475060) |
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摘 要: | We study the spatiotemporal Bloch states of a high-frequency driven two-component Bose–Einstein condensate(BEC)with spin–orbit coupling(SOC) in an optical lattice. By adopting the rotating-wave approximation(RWA) and applying an exact trial-solution to the corresponding quasistationary system, we establish a different method for tuning SOC via external field such that the existence conditions of the exact particular solutions are fitted. Several novel features related to the exact states are demonstrated; for example, SOC leads to spin–motion entanglement for the spatiotemporal Bloch states, SOC increases the population imbalance of the two-component BEC, and SOC can be applied to manipulate the stable atomic flow which is conducive to control quantum transport of the BEC for different application purposes.
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关 键 词: | Bose–Einstein CONDENSATE spin–orbit coupling SPATIOTEMPORAL BLOCH state spin–motion entanglement stable atomic flow high-frequency limit |
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