Macroscopic quantum interference from atomic tunnel arrays
Macroscopic quantum interference from atomic tunnel arrays
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DOI：
10.1126/science.282.5394.1686
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发表时间：
1998-11-27
期刊：
影响因子：
56.9
通讯作者：
Kasevich, MA
中科院分区：
文献类型：
--
作者：
Anderson, BP;Kasevich, MA
观察到了原子德布罗意波从垂直排列的宏观布居陷阱中隧穿的干涉，这些陷阱位于光学驻波的中心，从玻色-爱因斯坦凝聚体中加载。隧道效应是由重力引起的加速引起的，而干涉是作为一串原子下落的脉冲观察到的。在原子弱相互作用极限下，脉冲频率由相邻势垒之间的引力势能差决定。这种效应与超导电子系统中观察到的交流约瑟夫森效应密切相关。
Interference of atomic de Broglie waves tunneling from a vertical array of macroscopically populated traps has been observed, The traps were Located in the antinodes of an optical standing wave and were Loaded from a Bose-Einstein condensate. Tunneling was induced by acceleration due to gravity, and interference was observed as a train of falling pulses of atoms. In the Limit of weak atomic interactions, the pulse frequency is determined by the gravitational potential energy difference between adjacent potential wells. The effect is closely related to the ac Josephson effect observed in superconducting electronic systems.