Gravitational induced phase effects are investigated in neutron interferometry for testing the validity of the Newtonian potential

在中子干涉测量中研究引力引起的相位效应，以测试牛顿势的有效性

• 批准号: 167735302
• 负责人: Dr. Michael Zawisky
• 金额: --
• 依托单位: Atominstitut
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/167735302?language=en
• 关键词: Gravitational; induced; phase; effects; investigated

Gravitational phases induced on the neutron shall systematically be investigated in large neutron interferometers. In the perfect crystal interferometer, a single neutron is macroscopically separated by several centimetres and experiences phase shifts depending on the height of one path above the other. But the hitherto measured phase shifts are approximately 1% lower than expected. As the gravitational phase shift increases with the interferometer size the new generation of large neutron interferometers will be much more sensitive to gravitation. Our aim is the verification of the Newtonian gravitation law for a macroscopically separated very light sub-atomar quantum object. The same setup will be exploited for sensing hypothetic non-Newtonian short-range interactions by accurately measuring the coherent scattering length of silicon in a perfect crystal at different lattice reflections. A special feature of our setup is the sensitivity to the submicron interaction regime. This has the additional benefit that simultaneously a precision measurement of the neutron-electron scattering length is obtained.

应在大型中子干涉仪中系统地研究中子引起的引力相位。在理想晶体干涉仪中，单个中子在宏观上被分开几厘米，并根据一条路径高于另一条路径的高度而经历相移。但迄今为止测得的相移比预期低约1%。由于引力相移随干涉仪尺寸的增大而增大，新一代大型中子干涉仪将对引力更加敏感。我们的目标是验证宏观分离的亚原子量子物体的牛顿引力定律。相同的设置将被利用来感测假设的非牛顿短程相互作用，通过精确测量在不同的晶格反射下的完美晶体中的硅的相干散射长度。我们的设置的一个特点是对亚微米相互作用制度的敏感性。这具有额外的益处，即同时获得中子-电子散射长度的精确测量。