PbSe quantum dots for an evanescent wave excited fiber amplifier

A novel quantum dots (QDs) optical fiber amplifier was proposed and demonstrated. It was fabricated by dipcoating the PbSe QDs doped sol onto the taper region of fiber coupler. The PbSe QDs was synthesized according to a colloidal method. A lower refractive index sol was also synthesized as the host of PbSe QDs. A standard single mode fiber was used to make the fusion tapered fiber coupler which had double input and output ports. With the simple structure, a signal and a pump can be injected into the amplifier and excite the PbSe QDs through evanescent wave. The experimental results indicated that the amplified light wave was observed at 1 550 nm wavelength with 980 nm wavelength laser diode as pump.     

量子心理学之心—脑理论及其启示

在量子理论和相对论的成就使得物理学从经典物理学发展到现代物理学之后,量子心理学应运而生。基于量子理论而展开的对意识本质的讨论,引发了对传统的唯心主义与唯物主义哲学问题的思考,为意识与物质的关系问题的研究打开了新的突破口。量子心理学基于量子论对意识问题的研究,提出了独特的心-脑理论:心、脑活动可能均受控于量子域;意识活动在心-脑系统中起主导作用;心理活动的产生具有复杂的统计性质;意识、记忆等心理现象的产生过程亦存在遵循量子规律的可能。基于量子心理学的心-脑理论,可以对无意识、问题解决等心理活动过程加以推测,并可能提出精神疾病划分的新依据。     

用改进单纯形法优化由Matlab曲线拟合得到的表达式

运用改进单纯形法，通过调整有关参数，对由Matlab曲线拟合得到的表达式进行优化，得到精度更高的表达式。     

Bipolaron in different configuration of quantum confinement

The authors used Landau-Pekar variational method to investigate a strong-coupling singlet optical bipolaron in different configuration of quantum confinement.Numerical and analytical results showed that when configuration changes from quantum dot and wire to well,confinement shows different effect on the formation of a bipolaron.In contrast to a bipolaron in a quantum dot or wire,the binding energy of a bipolaron in a quantum well increases with increasing confinement,indicating that confinement favors bipolaron formation in a quantum well.     

Bipolaron in different configuration of quantum confinement

INTRODUCTION The bipolaron in bulk materials has been ex-tensively discussed in the past decade. With morerecent advances in the creation of nanocrystal withstrong ionic coupling (Hudgins et al., 1997), onenatural problem is that the effect of bipolarons insome quantum low dimensional systems with ef-fective electron-phonon coupling is very strongowing to the confinement. This problem is alsorelevant to the proposal of the bipolaronic mecha-nism for pairing in CuO2 plane (quasi-tw…     

论杨慎批点《文心雕龙》

明代杨慎批点《文心雕龙》主张作者要才学兼济,重视作者的真性情和文章的辞采。杨慎采取的五色圈点的形式既与个人喜好及风格有关,又有深厚的传统文化基础。     

复合材料导电开关特性的研究

研究了掺Al或Ag微粉的聚丙烯（PE）基和聚二氯乙烯（PVDF）基复合材料的导电开关特性，发现在某一电场阈值（对应开关电压阈值Vk）附近，复合材料的电导率随外电场的变化而发生大幅度变化，还研究了掺入金属微粉的种类、体积比及颗粒度对Vk的影响，验证了量子隧道效应是复合材料导电开关特性的主要机理。     

旋转参考系的选取及其应用

阐述了在量子光学中,选取旋转参考系变换系统哈密顿量的一般方法,同时也举例说明了选取适当的旋转参考系,将系统的哈密顿量化成简单的形式,从而可以简化计算并能顺利地解决问题。最后,给出了选取旋转参考系的一般结论。     

碳正离子的结构与稳定性的量子化学研究

用半经验的量子化学软件包MOPAC6 .0中的AM1方法 ,对一系列碳正离子进行了计算 ,由计算结果对其结构和稳定性进行了分析     

量子力学双波理论的非局域性

在以“非局域性”为标题的学术论著中,非局域性是有名的EPR论文~([1])中所体现的那种“局域性”的对立面,是A．Einstein同 N．Bobr~([2])所争论的焦点,而不是一些数学家~([3])所谈论的那种东西。数学家所谈沦的局域性是指类拟于“孤立波”那样的“鼓包”,而非局域性则是这种