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光晶格和磁微阱中的量子信息处理

Quantum Information Processing in Optical Lattices and Magnetic Microtraps

Philipp Treutlein, Tilo Steinmetz, Yves Colombe, Benjamin Lev, Peter Hommelhoff, Jakob Reichel, Markus Greiner, Olaf Mandel, Arthur Widera, Tim Rom, Immanuel Bl… 展开作者

Philipp Treutlein, Tilo Steinmetz, Yves Colombe, Benjamin Lev, Peter Hommelhoff, Jakob Reichel, Markus Greiner, Olaf Mandel, Arthur Widera, Tim Rom, Immanuel Bloch, Theodor W. Hänsch

摘要:

本文综述了我们在光晶格和磁性微阱中利用中性原子进行量子信息处理的实验。在莫特绝缘体体系中的光晶格中的原子充当大量子比特寄存器。一个自旋相关的晶格被用来分裂和离域的原子波函数在一个受控的和相干的方式超过一个定义数量的晶格网站。这是用来实验证明一个大规模的并行量子门阵列,它允许创建一个高度纠缠的多体集群状态通过相邻的晶格位置上的原子之间的相干碰撞。在原子芯片上的磁微阱中,我们演示了原子量子比特态的相干操纵,并在距离芯片表面微米的距离上测量了超过一秒的相干寿命。我们表明,微波近场芯片上可以用来创建状态依赖的潜力,实现量子控制相位门与这些强大的量子比特状态。针对单原子探测和制备,我们研制了高精细度光纤法布里-珀罗腔,并将其集成在原子芯片上。我们提出了一个实验中,我们发现了一个很小的数量的冷原子磁捕获在腔中使用的原子芯片。

英文摘要:

We review our experiments on quantum information processing with neutral atoms in optical lattices and magnetic microtraps. Atoms in an optical lattice in the Mott insulator regime serve as a large qubit register. A spin-dependent lattice is used to split and delocalize the atomic wave functions in a controlled and coherent way over a defined number of lattice sites. This is used to experimentally demonstrate a massively parallel quantum gate array, which allows the creation of a highly entangled many-body cluster state through coherent collisions between atoms on neighbouring lattice sites. In magnetic microtraps on an atom chip, we demonstrate coherent manipulation of atomic qubit states and measure coherence lifetimes exceeding one second at micron-distance from the chip surface. We show that microwave near-fields on the chip can be used to create state-dependent potentials for the implementation of a quantum controlled phase gate with these robust qubit states. For single atom detection and preparation, we have developed high finesse fiber Fabry-Perot cavities and integrated them on the atom chip. We present an experiment in which we detected a very small number of cold atoms magnetically trapped in the cavity using the atom chip.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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