Coherent manipulation of Bose-Einstein condensates with state-dependent microwave potentials on an atom chip
Coherent manipulation of Bose-Einstein condensates with state-dependent microwave potentials on an atom chip
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DOI：
10.1038/nphys1329
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发表时间：
2009-08-01
期刊：
影响因子：
19.6
通讯作者：
Treutlein, Philipp
中科院分区：
文献类型：
--
作者：
Boehi, Pascal;Riedel, Max F.;Treutlein, Philipp
基于纠缠的技术，如量子信息处理、量子模拟和量子增强计量，有可能彻底改变我们的计算和测量方式，并有助于澄清纠缠本身令人困惑的概念。原子芯片上的超冷原子对它们的实现很有吸引力，因为它们在紧凑、健壮和可扩展的设置中提供对量子系统的控制。这个系统中的一个重要工具是依赖于原子内部状态的势。在这种势态中，相干动力学与碰撞相互作用相结合，使单个原子和系综都能产生纠缠。在这里，我们展示了在原子芯片上用微波近场产生的状态依赖势中对玻色凝聚原子的相干操纵。我们可逆地纠缠原子内部状态和运动状态，实现了一个具有内部状态标记的捕获原子干涉仪。我们的系统提供了对介观凝聚体碰撞的控制，为芯片上产生多粒子纠缠和自旋压缩态量子增强计量铺平了道路。
Entanglement-based technologies, such as quantum information processing, quantum simulations and quantum-enhanced metrology, have the potential to revolutionize our way of computing and measuring, and help clarify the puzzling concept of entanglement itself. Ultracold atoms on atom chips are attractive for their implementation, as they provide control over quantum systems in compact, robust and scalable set-ups. An important tool in this system is a potential depending on the internal atomic state. Coherent dynamics in such a potential combined with collisional interactions enables entanglement generation both for individual atoms and ensembles. Here, we demonstrate coherent manipulation of Bose-condensed atoms in a state-dependent potential, generated with microwave near-fields on an atom chip. We reversibly entangle atomic internal and motional states, realizing a trapped-atom interferometer with internal-state labelling. Our system provides control over collisions in mesoscopic condensates, paving the way to on-chip generation of many-particle entanglement and quantum-enhanced metrology with spin-squeezed states.