报告题目：Self-imaging in longitudinally excited, high-order matter-wave superradiant scattering

报告人：邓鲁是美国著名科研机构National Institute of Science and Technology(NIST)的研究员，是国际知名的原子分子物理及光物理学者，在Nature， Physics Review Letters等国际一流刊物发表文章，曾获得美国光学协会Archie Mahan 奖 （1998年）， Edward Uhler Condon奖（2002年）。

时    间：2008-7-14下午2点半

地    点：理科楼A501

内容简介：We demonstrated matter-wave self-imaging in a bi-directional, asymmetric (one-branch, scattered-field result), high-order sequential matter-wave superradiant scattering. We show that it is the backward-propagating, stimulated field that, in conjunction with the pump field, diffracts the condensate, resulting in the collapse and revival of the condensate momentum distributions as a function of the pump pulse durations.We show that the observed matter-wave self-imaging is due to the atomic motion and instantaneous Doppler shift in a finite temporal phase grating. We also discuss new features of the matter-wave-superradiant-scattering-based grating formation and diffraction. It is remarkable that such a spontaneously stimulated generated field (therefore strongly wave propagation dependent) based temporal grating can yield such an impressive matter-wave self-imaging that collapses momentum distributions to all orders.