报告介绍 报告摘要： Ultrashort intense x-ray pulses available from new XFEL and HHG light sources allows to employ ultrafast and non-linear processes in atoms and molecules for probing quantum coherence effects and electron correlations on core-to-valence transitions [1]. The strong x-ray field can sufficiently alter the vibronic dynamics in the system, which is reflected particularly in the significant chan...

报告介绍 报告摘要：　　Low-dimensional magnetic materials have been proposed as building blocks for many intriguing applications, ranging from spintronics to quantum information processing, due to their novel properties which do not present in their bulk counterparts. Many new features of low-dimensional magnetic materials, such as magnetic anisotropy (MA), magneto-optic Kerr effect (MOKE) and quantum anomal...

报告介绍 Abstract:　　Tailoring the properties of semiconductor and magnetic structures has been a driving force of information technology. The goal of combining ferromagnetism with semiconductors into a single material has been pursued by physicists and materials scientists for about five decades. A brief review of the history of the magnetic semiconductors will be given before presenting our recent results...

报告介绍 报告摘要： Quantum Hall liquid is the first definitive example of a state of matter which does not break any symmetry, and exhibits "topological order". In this talk I will give a elementary introduction of this fascinating state of matter including the theoretical frameworks we use to understand it.报告人简介：　　Professor Dung-Hai Lee received his B.S. degree from the National Tsinghua ...

报告介绍 报告摘要： Material formation in nature is precisely controlled in all aspects from crystal nucleation, growth to assembly to deliver superior functions. Specific biomolecule-material interactions have been hypothesized to play important roles in these processes. Proteins, polymers and small molecules have been extensively explored to replicate the degree of control in material formation in vitro an...

报告介绍 报告摘要： Two-dimensional layered materials (2DLMs), such as graphene or molybdenum disulfide, represent an ideal 2D material system for exploring fundamental chemistry and physics at the limit of single atomic thickness, and have the potential to open up entirely new opportunities beyond the reach of existing materials to enable totally technologies. Here I will first give a brief overview of our ...

报告介绍 报告人简介：　　Prof. Kai-Ming Ho is a Distinguished Professor in Liberal Arts and Sciences at Iowa State University and Senior Scientist at the Ames Laboratory. He is a world leader in photonic crystals, and his research interests also include the area of electronic and structural properties of crystals, surfaces, clusters, metallic liquid and glass systems. Prof. Ho is a fellow of the American Phy...

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报告介绍 Abstract:　　Strongly correlated materials possess many remarkable properties, such as high-Tc superconductivity in cuprates and colossal magnetoresistance in doped manganites, arising from the complex interplay between spin, charge, orbital and lattice degrees of freedom. Electron liquid crystal (ELC) phases provide unique descriptions to characterize the electronic structures and elucidate th...

报告介绍 报告摘要： Heterogeneous catalysis is critical for the prosperity of human civilization. It provides access to the range of chemicals, materials, and fuels we use. Understanding and controlling catalytic processes are essential for developing improved energy storage and conversion technologies. Towards the long-term vision of precisely controlling active sites, our group has developed methods to coa...

报告介绍 报告摘要： Exploring novel quantum phases is always a central issue in condensed matter physics. In recent years, time-reversal symmetric topological phases (TI) have stimulated intensive interests due to its unique electronic structures and potential application ranging from spintronics to quantum computation. In this talk, I will present our recent works: 1)We analysis the relationship between Bor...

报告介绍 Abstract: 　　We develop an efficient scheme that allows for arbitrary operations on a cavity mode using a strongly dispersive qubit-cavity interaction and time-dependent drives. The scheme can readily be implemented using circuit QED systems. Moreover, the scheme can be extended for quantum error correction to protect information encoded in photonic cat states.

报告介绍 Abstract:　　Parity-time (PT) symmetry is a fundamental notion in quantum field theories and opens a new paradigm of non-Hermitian Hamiltonians ranging from quantum mechanics, electronics, to optics and photonics. By carefully exploiting the interplay between optical gain and loss in the complex dielectric permittivity plane, optics has become an ideal platform to study the fundamentals of PT symmet...

报告介绍 Abstract: 　　It is well known that radiation pressure forces of light can be used for the manipulation of mechanical motion in microscopic systems. Notable examples include laser cooling and laser tweezers. In this talk, I will discuss recent experimental advances on the use of radiation pressure force to control mechanical motion in macroscopic systems, with a focus on potential applications in qu...

报告介绍 Abstract： 　　Spin-orbit coupling is ubiquitous in quantum dot quantum computing architectures, and makes spin qubits susceptible to charge noise. We derive a Hamiltonian describing the effect of spin-orbit and noise on a single-spin qubit in a quantum dot. Relaxation is due to noise coupling different orbital levels and is dominated by screened whole charge defects near the dot. Dephasing stems fr...

报告介绍 Abstract　　Non-specific protein adsorption from complex biological media, especially from blood plasma, is an urgent challenge for the application of nanoparticles as delivery systems, diagnostics and other biomedical applications. The surface modification of nanoparticles by physically anchoring hydrophilic biocompatible polymers (A), by coating the NPs core with polymer brush layers with well-con...