报告介绍

报告介绍 Abstract: In this talk, he will discuss the following two subjects: (i) quantum criticality and unconventional superconductivity in the heavy fermion (HF) systems; and (ii) the superconducting pairing state in materials lacking inversion symmetry. The study of quantum critical phenomena has attracted considerable attention because of the fascinating physical properties caused by quantum fluctuations...

报告介绍 极低温下输运性质的测量，是对关联电子材料基态准粒子行为的直接观察，对研究关联电子体系的基态具有重要意义。我们通过测量极低温（至20 mK）和强磁场（至17 T）下的电阻率和热导率，对几个关联电子材料进行了研究：1）确定了Na0.7CoO2的基态仍然是费米液体；2）在反铁磁体Nd2CuO4中首次观察到了T3温度依赖关系的反铁磁自旋波热导率；3）确定了超导体CuxTiSe2的超导能隙具有s波对称性；4）初步确定了铁基超导体BaFe1.9Ni0.1As2、FeS...

报告介绍 成家杨 (Jay J. Cheng) 博士是美国北卡罗莱纳州立大学生物和环境工程系终身正教授。1982年本科毕业于江西工学院（现南昌大学）化学工程专业，1996年获美国俄亥俄州辛辛那提大学环境工程专业博士学位。 1997年在北卡罗莱纳州立大学生物与农业工程系任助理教授， 2003和2008年分别提升为副教授和正教授。 成家杨教授在生物质能源包括利用木质纤维素制备燃料乙醇和环境工程（利用水生植物Duckweed 进行污水处理）等领域的研究处于国际领...

报告介绍 量子光机械系统作为一个全新的研究领域, 在最近几年获得了令人瞩目的发展。我们提出应用激光光镊束缚和冷却玻璃球,把玻璃球质心运动冷却到量子基态, 制作一个达到量子极限的微小探测器。我们已经成功用光镊在空气和真空里束缚玻璃球, 并研究了小球在空气里的布朗运动。我们观测到了在很短的时间尺度下, 布朗运动不符合爱因斯坦的理论。我们还首次成功测量了布朗运动的瞬时速度。这种超灵敏光镊技术还有很多其它的应用,比如用来探测单...

报告介绍 Abstract: The force exerted by photons is of fundamental importance in light- matter interactions. For example, in free space, optical tweezers have been widely used to manipulate atoms and microscale dielectric particles. This optical force is expected to be greatly enhanced in a nanophotonic waveguides in which light is highly concentrated with orders of magnitude larger intensity. Recently, we re...

报告介绍

报告介绍

报告介绍 摘要：Recently, a new class of topological states has been proposed and experimentally realized. These topological insulators have an insulating gap in the bulk, but have topologically protected edge or surface states due to the time reversal symmetry. In two dimensions the edge states give rise to the quantum spin Hall (QSH) effect, in the absence of any external magnetic field. I shall review the ...

报告介绍

报告介绍 完整报告题目:  Quantum manipulation of topological qubits by quantum tunneling effect – new way towards fault-torrent quantum computation报告摘要： The degenerate ground states of topological order (the so-called topological qubits) are used as the protected code subspace to build a quantum computer by tuning their quantum tunneling effect. We study quantum tunneling effects of the topolo...

报告介绍 摘要：Topological order is a new type of quantum state beyond Laudau paradigm. Recently, many different systems with topologically ordered ground states on spin model (we call them symmetry protected topological orders) were found. How to classify symmetry protected topological orders and how to describe the quantum phase transitions between them (topological quantum phase transitions)? What's topol...

报告介绍 Abstract：The cluster-based nanostructures with quantum properties become one of hot topics in current nanoscience and nanotechnology. Following are a few examples related to the research work in our group.1) Quantization of surface phonon modes of Si clusters; 2) Long lifetime photolumicescence of silicon cluster-assembled nanowires; 3) Conductance resonance in gold cluster-assembled nanostructures...

报告介绍 完整报告题目：Applications of nonlinear optics in nanometer-scale far-field microscopy and oilsands surface chemistry

报告介绍

报告介绍 绿色化学化工是未来化学的必经之路， 绿色替代溶剂是其中一个重要的研究内容，本报告将就近年来绿色溶剂的研究热点之一：“室温离子液体在绿色化学中的应用及工业化”进行重点介绍，报告人在该领域具有丰富的研究经验与大量工业化研究成果。