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arXiv 1405.6495cond-mat.supr-con
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第二类超导芯片上磁性原子阱的三维建模

3D modeling of magnetic atom traps on type-II superconductor chips

Vladimir Sokolovsky, Leonid Prigozhin, John W. Barrett

摘要:

冷原子磁阱已成为冷原子物理和凝聚态研究的有力工具。超导芯片上的陷阱允许人们通过与典型的正常金属导体相比降低几个数量级的热噪声来增加被捕获的原子寿命和相干时间。混合状态下的薄超导膜通常是这种芯片的主要元件。本文用有限元方法分析了第二类超导中薄膜的磁化强度和输运电流,研究了最近在实验中应用的磁陷阱。所提出的方法使我们能够预测磁陷阱的重要特性(它们的深度,形状,与芯片表面的距离等)。这是在冷原子实验中设计磁阱所必需的。

英文摘要:

Magnetic traps for cold atoms have become a powerful tool of cold atom physics and condense matter research. The traps on superconducting chips allow one to increase the trapped atom life- and coherence time by decreasing the thermal noise by several orders of magnitude compared to that of the typical normal-metal conductors. A thin superconducting film in the mixed state is, usually, the main element of such a chip. Using a finite element method to analyze thin film magnetization and transport current in type-II superconductivity, we study magnetic traps recently employed in experiments. The proposed approach allows us to predict important characteristics of the magnetic traps (their depth, shape, distance from the chip surface, etc.) necessary when designing magnetic traps in cold atom experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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