邱荣涛 2009年11月26日下午4:3018教学楼405 The intensity gradients of inhomogeneous laser-light fields impose ponderomotive forces on charged particles. Such forces have been used to trap and manipulate ions, diffract electrons, and generate charge waves in plasmas. But they were ...
实验证实任意子分数统计 邱荣涛 2009年11月19日下午4:30-6:1018教学楼405 Anyons are exotic quasiparticles living in two dimensions that do not fit into the usual categories of fermions and bosons, but obey a new form of fractional statistics. Following a rec ...
Universe's quantum 'speed bumps' no obstacle for light A hint that quantum fluctuations in the fabric of the universe slow the speed of light has not been borne out in observations by NASA's Fermi telescope. The measurements contradict a 2005 result that supported the idea that spac ...
参考文献:S. Dodelson and M. Vesterinen, Cosmic Neutrino Last Scattering Surface , Phys. Rev. Lett. (to be published) 文章下载 内容简介见: http://focus.aps.org/story/v24/st15 So Close, yet So Far Observations of cosmic microwaves from 380,000 years after the big bang have be ...
这个题目由庞海作为小道消息讲。如果需要文章可以在评论中写上你的邮件地址,我们给你寄去。 The von Neumann relation generalized to coarsening of three-dimensional microstructures R. D. MacPhersonandD. J. Srolovitz, Nature 446 , 1053-1055 (26 April 2007). Abstract Cellular ...
THE OVERLAP OF TWO PHOTONS Physicists routinely use a movable mirror to measure the timing of laser pulses that are only femtoseconds (10-15 seconds) long, and now they have extended the technique to pairs of photons. A team reporting in the 18 September Physical Review Letters studied entang ...