Quantum ballistic experiment on antihydrogen fall
Quantum ballistic experiment on antihydrogen fall
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反氢落下的量子弹道实验
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
S. Reynaud
中科院分区：
文献类型：
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作者：
A. Voronin;V. Nesvizhevsky;Gabriel Dufour;S. Reynaud
我们提出了一种基于反原子自由落体事件时间分布的干涉测量法来测量反氢引力质量（H ́ ?> ）的方法。我们的方法包括准备位于地球引力场中材料表面附近的量子态 H 的相干叠加，然后观察最初准备的叠加从给定高度自由落体到探测器板后湮没事件的时间分布。我们表明，感兴趣的时间分布被映射到初始波包的精确可预测的速度分布。该方法与通过使用振荡梯度磁场诱导共振跃迁来产生引力态的相干叠加相结合。我们证明，用这种方法测量 H ¯ ?> 原子引力质量的相对精度可以达到 10−4，其中 103 个反原子处于最低引力状态。
We propose an approach to measuring gravitational mass of antihydrogen ( H ¯ ?> ) based on interferometry of time distribution of free-fall events of antiatoms. Our method consists of preparing a coherent superposition of quantum states of H ¯ ?> localized near a material surface in the gravitational field of the Earth, and then observing the time distribution of annihilation events after the free-fall of the initially prepared superposition from a given height to a detector plate. We show that the time distribution of interest is mapped to a precisely predictable velocity distribution of the initial wave packet. This approach is combined with production of a coherent superposition of gravitational states by inducing a resonant transition using an oscillating gradient magnetic field. We show that the relative accuracy of measuring the H ¯ ?> atom gravitational mass can be achieved with this approach is 10−4, with 103 antiatoms settled in lowest gravitational states.