Phase dependent loading of Bloch bands and quantum simulation of relativistic wave equation predictions with ultracold atoms in variably shaped optical lattice potentials
Phase dependent loading of Bloch bands and quantum simulation of relativistic wave equation predictions with ultracold atoms in variably shaped optical lattice potentials
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DOI：
10.1080/09500340.2015.1137370
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发表时间：
2016-01-01
影响因子：
1.3
通讯作者：
Weitz, Martin
中科院分区：
文献类型：
--
作者：
Grossert, Christopher;Leder, Martin;Weitz, Martin
超冷原子的色散关系可以被调谐到类似于相对论粒子的色散关系，即线性的，而不是通常的自由原子的非相对论二次色散关系。这种晶格中的冷原子可以用来进行相对论波动方程预测的量子模拟。我们开始这篇文章，首先描述一种拉曼技术，该技术允许选择性地将原子加载到带交叉附近的晶格的所需布洛赫带中。随后，我们回顾了最近的两个实验，准相对论性铷原子在双色晶格，分别展示了类似的超冷原子的克莱因隧道效应和Veselago透镜效应。
The dispersion relation of ultracold atoms in variably shaped optical lattices can be tuned to resemble that of a relativistic particle, i.e. be linear instead of the usual nonrelativistic quadratic dispersion relation of a free atom. Cold atoms in such a lattice can be used to carry out quantum simulations of relativistic wave equation predictions. We begin this article by describing a Raman technique that allows to selectively load atoms into a desired Bloch band of the lattice near a band crossing. Subsequently, we review two recent experiments with quasirelativistic rubidium atoms in a bichromatic lattice, demonstrating the analogues of Klein tunnelling and Veselago lensing with ultracold atoms, respectively.