Loading ultracold atoms onto nonlinear Bloch states and soliton states in bichromatic lattices
Loading ultracold atoms onto nonlinear Bloch states and soliton states in bichromatic lattices
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DOI：
10.1103/physreva.104.013309
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发表时间：
2021-03
影响因子：
2.9
通讯作者：
Tomotake Yamakoshi;S. Watanabe
中科院分区：
文献类型：
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作者：
Tomotake Yamakoshi;S. Watanabe
我们模拟和分析了在一维双色晶格中将相互作用的超冷原子加载到非平凡量子态如非线性布洛赫波和孤子解上的实验方法。标准带，倒置带，并与Dirac-like点允许的双色晶格带，我们考虑的情况下，倒置带和检查加载过程中的非线性布洛赫波所形成的聚集的超冷原子所描述的平均场模型。具体来说，我们解决了Gross-Pitaevskii方程数值，并找到了一个合适的驻波脉冲序列的倒带，该序列被证明是一个合适的协议产生孤子的解决方案。此外，我们还研究了后加载过程中的外部势和动力学不稳定性的影响。我们还提供了一个适当的数据集，为未来的实验实现我们的研究结果。
We simulate and analyze an experimental method of loading interacting ultracold atoms onto nontrivial quantum states such as nonlinear Bloch wave and soliton solutions in a 1-dimensional bichromatic lattice. Of standard bands, inverted bands, and bands with Dirac-like points permitted by a bichromatic lattice, we consider the case of an inverted band and examine the loading process in terms of nonlinear Bloch waves formed by an aggregate of ultracold atoms described by the mean-field model. Specifically, we solved the Gross-Pitaevskii equation numerically and found an appropriate standing wave-pulse sequence for the inverted band, which sequence proved to be a suitable protocol for producing soliton solutions. In addition, we examined the effect of an external potential and dynamical instabilities for the post-loading process. We also provide an appropriate data set for future experimental realization of our findings.