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首页> 外文期刊>International journal of modern physics, D. Gravitation, astrophysics, cosmology >Testing gravity in large extra dimensions using Bose-Einstein condensates
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Testing gravity in large extra dimensions using Bose-Einstein condensates

机译:使用Bose-Einstein冷凝水测试大尺寸额外重力

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Recent conjectures that there are mesoscopically "large" extra dimensions, through which gravity propagates have interesting implications for much of physics. The scenario implies gross departures from Newton's law of gravity at small length scales. Testing departures from Coulomb's law on sub-millimetre scales is hard. It is now possible to routinely create Bose-Einstein condensates with de Broglie wavelengths of order a mum, and total size of order 10 mum. BEC condensates move coherently under gravitational acceleration, and I propose that the transverse fringe shift due to the acceleration of a pair of interfering BECs passing a dense linear mass may be measurable, and provide direct evidence for anomalous gravitational acceleration. Ideally such experiments are best carried out in free fall to maximise the time spent by a BEC in the non-Newtonian regime. [References: 14]
机译:最近的推测是,介观地存在着“大”的额外维度,重力通过这些额外维度传播,对许多物理学都产生了有趣的影响。该场景暗示在小尺度上与牛顿万有引力定律有明显的背离。在亚毫米尺度上测试与库仑定律的偏差是很难的。现在可以按常规方式创建玻色-爱因斯坦缩合物的de Broglie波长约为1微米,总尺寸约为10微米。 BEC凝结物在重力加速度下会连贯地运动,我建议通过一对密集的线性质量块的干扰BEC的加速度引起的横向条纹位移可以测量,并且可以为重力异常加速度提供直接证据。理想情况下,此类实验最好在自由落体中进行,以最大化BEC在非牛顿体系中所花费的时间。 [参考:14]

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