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恒元物理学讲座(第123期):Gravitational and relativistic deflection of X-ray superradiance

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报告日期:2018917

报告时间:16:30

人:廖文德 教授(台湾国立中央大学)

报告地点:长安校区  物理学与信息技术学院六层学术报告厅(致知楼3623-3624

主办单位:物理学与信息技术学院

报告人简介:

Prof. Wen-Te Liao received his PhD in Heidelberg University and Max Planck institute for nuclear physics in 2013. He worked in Center for Free Electron Laser Science at DESY during 2014-2015 as a postdoc. Since August 2015 he became an assistant professor in National Central university in Taiwan. His research focuses on x-ray and optical quantum optics. Till now he has contributed 16 peer-reviewed papers (Nature photonics, PRL et al.) and 36 invited talks. His PhD dissertation had been selected and published as Springer Theses.

报告摘要:

Einstein predicted that clocks at different altitudes tick at various rates under the influence of gravity. This effect has been observed using 57Fe Mössbauer spectroscopy over an elevation of 22.5 m or by comparing accurate optical clocks at different heights on a submetre scale. However, challenges remain in finding novel methods for the detection of gravitational and relativistic effects on more compact scales. Here, we investigate a scheme that potentially allows for millimetre- to submillimetre-scale studies of the gravitational redshift by probing a nuclear crystal with X-rays. Also, a rotating crystal can force interacting X-rays to experience inhomogeneous clock tick rates within it. We find that an association of gravitational redshift and special-relativistic time dilation with quantum interference is manifested by a time-dependent deflection of X-rays. The scheme suggests a table-top solution for probing gravitational and special-relativistic effects, which should be within the reach of current experimental technology.

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