Abstract: First I will talk about the impact of decoherence and disorder on the dynamics of discrete quantum walks and simulate different environment influences on quantum walks resulting in a ballistic spread, Anderson localization and a diffusive random walk Then I will also talk about how single- and multi-particle quantum walks can be implemented with different physical systems such as ion trap, linear optics and cavity quantum electrodynamics. The implementation of a quantum walk with single- and multi-particle opens up the interesting possibility to introduce entanglement and more advanced walks. With different coin tosses and initial states the quantum walks show different probability distributions which deviate strongly from the classical random walk with quadratic enhanced spreadings and localization effects. By introducing controllable decoherence, the transition from quantum walks to the classical version is observed.
报告人简介: 薛鹏,女,东南大学物理系教授,博导。1999年以优异的成绩提前一年于中国科学技术大学物理系毕业,获得学士学位,并免试进入本校中科院量子信息重点实验室攻读博士学位,师从郭光灿院士,于2004年7月获得博士学位。之后赴奥地利因斯布鲁克大学物理系、奥地利科学院量子光学和量子信息研究所,以及加拿大卡尔加里大学物理系作为博士后从事量子通信和量子计算的物理实现以及量子光学和原子分子光学物理的基础研究工作,致力于量子通信和量子计算的实用化和工程化,在国际顶级学术期刊以第一作者发表学术论文40余篇,文章被Science, Nature等国际主要学术期刊400余次引用,单篇引用最高达100余次,受邀在国内外专业学术会议上作大会报告并论文宣读40余次。并受新华出版社邀请翻译澳大利亚科学家G.J. Milburn撰写的《神奇的量子世界》一书。从2008年开始担任学术期刊Central European Journal of Physics 编委,以及多个国内外学术期刊的审稿人。先后主持三项国家自然科学基金(其中一项已结题)、两项教育部基金、一项江苏省自然科学基金面上项目,作为学术骨干参与科技部重大研究计划(973项目)一项,2010年入选东南大学优秀青年教师教学科研资助计划,2011年被东南大学聘为青年特聘教授。
Date&Time: October 24, 2012 (Wednesday), 15:00–16:00
Location: 606 Conference Room