Dephasing of entangled atoms as an improved test of quantum gravity
Dephasing of entangled atoms as an improved test of quantum gravity
复制标题
纠缠原子的相移作为量子引力的改进测试
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
B. Varcoe
中科院分区：
文献类型：
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作者：
M. Everitt;Martin L. Jones;B. Varcoe
在最近的一篇文章中，王等人。(班级。量子格拉夫。23(2006)L59)，证明了粒子的相位起伏是由于与共形引力场的随机偏差相互作用而引起的。此外，他们还证明了原子干涉仪对这些波动是敏感的，并且对普朗克尺度效应的敏感性可以通过足够灵敏的干涉仪来实现。在这篇文章中，我们证明了一类纠缠态，N原子的Greenberger-Horne-Zeilinger(GHz)态，提供了比原子干涉仪更好的标度，并且目前的实验能够在这一领域产生重大影响。我们概述了一个实验，它使用激发到里德堡态的Rb原子的原子束。原子在高品质因数微波谐振器中经历受控碰撞，其序列使得到的态对共形场涨落高度敏感。我们证明了灵敏度的显著提高是可能的。
In a recent article Wang et al. (Class. Quantum Grav. 23 (2006) L59), demonstrated that the phase of a particle fluctuates due to interactions with random deviations of a conformal gravitational field. Furthermore they demonstrated that atom interferometers are sensitive to these fluctuations and that sensitivity to Planck scale effects could be achieved with a sufficiently sensitive interferometer. In this paper we demonstrate that a class of entangled states, the N-atom Greenberger-Horne-Zeilinger (GHZ) states, provide a better scaling than atom interferometers and that current experiments are capable of making a significant impact in this field. We outline an experiment which uses atomic beams of rubidium atoms excited to Rydberg states. The atoms undergo controlled collisions in high quality factor microwave resonators in a sequence that makes the resulting state highly sensitive to conformal field fluctuations. We show that a significant advance in sensitivity is possible.