Bose-Einstein condensate of metastable helium for quantum correlation experiments
Bose-Einstein condensate of metastable helium for quantum correlation experiments
复制标题
用于量子相关实验的亚稳氦玻色-爱因斯坦凝聚体
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
A. Zeilinger
中科院分区：
文献类型：
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作者：
Michael Keller;M. Kotyrba;F. Leupold;Mandip Singh;M. Ebner;A. Zeilinger
我们报道了亚稳态氦-4的玻色-爱因斯坦凝聚的实现。在一种新型的脉冲管低温源中将氦激发到亚稳态后，原子束被准直并减速。然后，我们在磁光阱中捕获了几个10^8原子。为了随后的蒸发冷却，原子被转移到一个磁阱中。简并通常由几个10^6原子实现。为了高分辨率地检测原子相关性，安装了超快延迟线探测器。该探测器由四个具有独立读出电子器件的象限组成，允许真正同时检测原子，特别适合需要检测相关子系统的量子相关实验。我们期望我们的设置能够在一个类似于爱因斯坦-波多尔斯基-罗森-格丹肯实验的场景中直接证明动量纠缠。这将为利用量子相关特性的物质波实验铺平道路。
We report on the realization of Bose-Einstein condensation of metastable helium-4. After exciting helium to its metastable state in a novel pulse-tube cryostat source, the atomic beam is collimated and slowed. We then trap several 10^8 atoms in a magneto-optical trap. For subsequent evaporative cooling, the atoms are transferred into a magnetic trap. Degeneracy is achieved with typically a few 10^6 atoms. For detection of atomic correlations with high resolution, an ultrafast delay-line detector has been installed. Consisting of four quadrants with independent readout electronics that allow for true simultaneous detection of atoms, the detector is especially suited for quantum correlation experiments that require the detection of correlated subsystems. We expect our setup to allow for the direct demonstration of momentum entanglement in a scenario equivalent to the Einstein-Podolsky-Rosen gedanken experiment. This will pave the way to matter-wave experiments exploiting the peculiarities of quantum correlations.