The pump–probe coupling of matter wave packets to remote lattice states
The pump–probe coupling of matter wave packets to remote lattice states
复制标题
物质波包与远程晶格态的泵浦-探针耦合
DOI：
10.1088/1367-2630/14/8/083013
复制
发表时间：
2011
影响因子：
3.3
通讯作者：
J. Arlt
中科院分区：
文献类型：
--
作者：
J. Sherson;Sung Jong Park;P. L. Pedersen;N. Winter;M. Gajdacz;S. Mai;J. Arlt
波包的相干操纵在物理学的许多领域都是一个重要的工具。我们证明了超冷原子受外简谐势阱束缚时准自由波包的实验实现。波包是通过调制包含玻色-爱因斯坦凝聚的光晶格的强度产生的。这些波包的演变进行监测，并在带隙观察到他们的六光子反射。在与泵浦-探测光谱学的直接类比中，探测脉冲允许波包的共振去激发成位于离主要组分超过100个晶格位点的长的可控距离处的选定晶格位点周围的状态。因此，这种用于超冷原子的精确控制机制能够实现用于量子动力学、计量学和模拟的受控量子态制备和分裂。
The coherent manipulation of wave packets is an important tool in many areas of physics. We demonstrate the experimental realization of quasi-free wave packets of ultra-cold atoms bound by an external harmonic trap. The wave packets are produced by modulating the intensity of an optical lattice containing a Bose–Einstein condensate. The evolution of these wave packets is monitored in situ and their six-photon reflection at a band gap is observed. In direct analogy with pump–probe spectroscopy, a probe pulse allows for the resonant de-excitation of the wave packet into states localized around selected lattice sites at a long, controllable distance of more than 100 lattice sites from the main component. This precise control mechanism for ultra-cold atoms thus enables controlled quantum state preparation and splitting for quantum dynamics, metrology and simulation.