新葡萄88805官网“博约学术论坛”系列报告第47期
来源： 作者： 发布时间：2014-08-11邀请人：
报告人：
时间： 2014-08-11
地点：
主讲人简介：
报告人：叶锦武 教授（首都师范大学，美国密西西比州立大学）
时 间：2014年8月13日（星期三）上午10点
地 点：中心教学楼610Abstract
We study spin or boson Hubbard models at integer fillings in the presence of spin-orbit couplings (SOC). At strong interactions, we derive a Rotated Ferromagnetic Heisenberg (RH) model which is a new class of quantum spin models. We introduce Wilson loops to characterize frustrations and gauge equivalent class in this RH model. For a special equivalent class, we identify a new spin-orbital entangled quantum ground state. The excitation spectrum above the ground state has a continuously changing minimum positions tuned by the SOC strength which can be mapped out by the peak positions of various Bragg spectroscopies at low temperatures. At high temperatures, the specific heat depends on the SOC strength explicitly which can be detected through specific heat measurements. We show that one special gauge （called " U(1) " gauge ) can be very naturally and easily realized in current experiments. It is also possible to realize other gauges in near future experiments.
报告人简历
叶锦武，，美国耶鲁大学理论物理博士，现任首都师范大学长江学者教授和美国密西西比州立大学教授. 叶教授主要研究领域是强相互作用的电子，自旋，光子等基本粒子的合作现象和量子相变理论,
也研究中国人民解放军的历史, 特别是开国战神粟裕战略和战术对自然科学的指导作用.
联系方式：新葡萄88805官网办公室
邀请人：姚玉贵教授
网址：http: