Spatial adiabatic passage of massive quantum particles in an optical Lieb lattice
Spatial adiabatic passage of massive quantum particles in an optical Lieb lattice
复制标题
光学利布晶格中大质量量子粒子的空间绝热通过
DOI：
10.1038/s41467-019-14165-3
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发表时间：
2020
影响因子：
16.6
通讯作者：
H. Ozawa and Y. Takahashi
中科院分区：
文献类型：
--
作者：
S. Taie;T. Ichinose;H. Ozawa and Y. Takahashi
量子干涉是量子力学的核心。通过利用相消干涉，可以在两个状态之间转移物理对象，而无需填充连接初始状态和最终状态所必需的中间状态。一个著名的应用是受激拉曼绝热通道技术，其中原子内态可以高效率地转移，而不考虑损耗的中间态。一个有趣的情况是，初始态和最终态在空间上分离得很好。量子力学允许一个粒子在没有实际可能性的情况下在中间区域被发现。在这里，我们证明了这种空间绝热通道与超冷原子在光学晶格。关键是暗本征态的存在，形成一个平坦的能带，并观察到两个子晶格之间的有效转移。这一工作为研究囚禁冷原子的相干控制提供了理论依据。
Quantum interference lies at the heart of quantum mechanics. By utilizing destructive interference, it is possible to transfer a physical object between two states without populating an intermediate state which is necessary to connect the initial and final states. A famous application is a technique of stimulated Raman adiabatic passage, where atomic internal states can be transfered with high efficiency regardless of lossy intermediate states. One interesting situation is a case where the initial and final states are spatially well separated. Quantum mechanics allows a particle to move without practical possibility of being found at the intermediate area. Here we demonstrate this spatial adiabatic passage with ultracold atoms in an optical lattice. Key to this is the existence of dark eigenstates forming a flat energy band, with effective transfer between two sublattices being observed. This work sheds light on a study of coherent control of trapped cold atoms.