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arXiv 1605.09604cond-mat.quant-gas
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利用周期性振动光学正方晶格实现均匀合成磁场

Realization of uniform synthetic magnetic fields by periodically shaking an optical square lattice

C. E. Creffield, G. Pieplow, F. Sols, N. Goldman

摘要:

通过在时间上周期性地调制晶格系统的位置来摇动晶格系统,是在工程量子系统中产生有效磁场的有力方法,例如捕获在光晶格中的冷气体。然而,这种方案通常与空间相关的有效质量(隧穿振幅)和不均匀的通量模式。在这项工作中,我们通过计算与几种晶格振动协议相关的有效汉密尔顿量和准能谱,从理论上研究了这一现象。提供了与基于在主静态光晶格之上添加移动晶格的方法的详细比较。这项研究允许识别新的摇动计划,同时提供均匀的有效质量和磁通量,与冷原子实验和光子学的直接影响。

英文摘要:

Shaking a lattice system, by modulating the location of its sites periodically in time, is a powerful method to create effective magnetic fields in engineered quantum systems, such as cold gases trapped in optical lattices. However, such schemes are typically associated with space-dependent effective masses (tunneling amplitudes) and non-uniform flux patterns. In this work we investigate this phenomenon theoretically, by computing the effective Hamiltonians and quasienergy spectra associated with several kinds of lattice-shaking protocols. A detailed comparison with a method based on moving lattices, which are added on top of a main static optical lattice, is provided. This study allows the identification of novel shaking schemes, which simultaneously provide uniform effective mass and magnetic flux, with direct implications for cold-atom experiments and photonics.

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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