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学术报告(20180612)Airborne and underground matter-wave interferometers: geodesy, navigation and general relativity
发布时间:2018-06-12

报告题目: Airborne and underground matter-wave interferometers: geodesy, navigation and general relativity
报告人: Philippe Bouyer
报告人单位: University of Bordeaux
报告时间: 2018年6月12日15:00
报告地点: 引力中心三楼会议室
报告摘要:  
  The remarkable success of atom coherent manipulation techniques has motivated competitive research and development in precision metrology. Matter-wave inertial sensors – accelerometers, gyrometers, gravimeters – based on these techniques are all at the forefront of their respective measurement classes. Atom inertial sensors provide nowadays about the best accelerometers and gravimeters and allow, for instance, to make the most precise monitoring of gravity or to device precise tests of the weak equivalence principle (WEP). I present here some recent advances in theses fields :
The outstanding developments of laser-cooling techniques and related technologies allowed the demonstration of an airborne matter-wave interferometers, which operated in the micro-gravity environment created during the parabolic flights of the Novespace Zero-g aircraft. Using two atomic species (for instance 39K and 87Rb) allows to verify that two massive bodies will undergo the same gravitational acceleration regardless of their mass or composition, allowing a test of the Weak Equivalence Principle (WEP).
New concepts of matter-wave interferometry can be used to study sub Hertz variations of the strain tensor of space-time and gravitation. For instance, the MIGA instrument which is currently built in France, will allow the monitoring of the evolution of the gravitational field at unprecedented sensitivity, which will be exploited both for geophysical studies and for Gravitational Waves (GWs) detection.
报告人简介:  
  Prof. Philippe Bouyer is the director of the Laboratory for Photonics and Nanosciences in the University of Bordeaux. His interests among many, are Bose-Einstein condensates in disorder potential, coherent atomic sources and atom lasers, Bose-Fermi mixture for atom interferometry. He also collaborates with many internationally renown research groups on atom interferometry, inertial sensors, atom interferometry in space and miniature atom sensors.

 

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