Production and manipulation of wave packets from ultracold atoms in an optical lattice
Production and manipulation of wave packets from ultracold atoms in an optical lattice
复制标题
光学晶格中超冷原子波包的产生和操纵
DOI：
10.1103/physreva.88.023620
复制
发表时间：
2013
影响因子：
2.9
通讯作者：
J. Arlt
中科院分区：
文献类型：
--
作者：
P. L. Pedersen;M. Gajdacz;N. Winter;A. Hilliard;J. Sherson;J. Arlt
在光学晶格和谐波磁阱的组合势内，可以通过晶格的强度调制来形成物质波包。对这些波包的产生和运动的分析提供了对系统动态演化的详细了解。调制技术还允许原子从这种波包到晶格束缚状态的可控转移（去激发）。因此，它作为物质波的分束器，可以选择性地处理不同的波段，使原子在选定的局部状态下制备。波包产生和去激发的结合非常类似于众所周知的泵浦探针光谱学方法。在这里，我们使用去激发法对磁阱的非谐性进行精密光谱分析。最后，我们证明了晶格调制可以用来激发物质波包到更高的动量，产生在精密测量中具有潜在应用的快速波包。
Within the combined potential of an optical lattice and a harmonic magnetic trap, it is possible to form matter wave packets by intensity modulation of the lattice. An analysis of the production and motion of these wave packets provides a detailed understanding of the dynamical evolution of the system. The modulation technique also allows for a controllable transfer (de-excitation) of atoms from such wave packets to a state bound by the lattice. Thus, it acts as a beam splitter for matter waves that can selectively address different bands, enabling the preparation of atoms in selected localized states. The combination of wave packet creation and de-excitation closely resembles the well-known method of pump-probe spectroscopy. Here, we use the de-excitation for precision spectroscopy of the anharmonicity of the magnetic trap. Finally, we demonstrate that lattice modulation can be used to excite matter wave packets to even higher momenta, producing fast wave packets with potential applications in precision measurements.