在位相空间中求解外力含时的受迫量子谐振子

运用广义线性量子变换理论 ,在位相空间中通过算子的代数运算求解外力含时的受迫谐振子 ,给出了演化算子、演化算子矩阵元和波函数的表示式 .     

关于量子控制系统的哲学思考

环境对量子控制系统的消相干揭示了一个事实,即量子世界里的系统将是一种全新的系统,它是某种开放的、数学的、并且是基于量子逻辑的系统。笔者认为,假如仍然还是立足经典思维,则系统的独立性将难以得到保证,传统的整体论也将变得自相矛盾。只有发展全新的"量子整体论",并在这种新的框架下去审视和建构量子系统,我们才有可能重新获得某种连贯一致的整体论。     

Regularization with Maximum Entropy and Quantum Electrodynamics: The Merg(E) Estimators

It is well-known that under fairly conditions linear regression becomes a powerful statistical tool. In practice, however, some of these conditions are usually not satisfied and regression models become ill-posed, implying that the application of traditional estimation methods may lead to non-unique or highly unstable solutions. Addressing this issue, in this paper a new class of maximum entropy estimators suitable for dealing with ill-posed models, namely for the estimation of regression models with small samples sizes affected by collinearity and outliers, is introduced. The performance of the new estimators is illustrated through several simulation studies.     

量子磁盘表面磁场分布模拟

量子磁盘由于记录点尺寸很小,用常规的磁场测量方法无法对其表面磁场分布数值图进行测试。为了证实量子磁盘的可行性,该文对量子磁盘表面的磁场分布用有限元软件进行模拟计算,在假设量子磁盘的磁化方向为水平磁化的前提下,得到了圆形量子点直径为20nm;量子点间距离为10nm;方形量子点边长为20nm,间距为20nm的情况下量子磁盘的二维表面磁场分布图,证实了其表面磁场分布具有明显的周期性,周期长度为量子点大小加上量子点间距离。并且所得到的磁场分布图为量子磁盘的理论研究提供了一定的参考数据。     

量子阱光电子开关器件(一)

量子阱半导体结构可使诸如光调制器和开关等光电子器件做得更小、更快、效率更高。它所具有的逻辑特性使其在并行高速互连的电子集成电路的集成度上具有良好的潜力。光电子器件能采用波导,也能采用二维并行阵列制作。其集成规模可达2048个单元,可工作的光逻辑和存贮器件的阵列得以实现及运行,所有单元都可由自由空间光(free-space optics)进行外部并行访问。本文概述了量子阱器件的运行机理及其发展前景。     

量子的实在性

物理学概念基础的变革往往是人类思维方式变革的前兆,量子概念就是架起从经典物理学通往量子力学的概念之一,也是科学哲学实在论和反实在论两大阵营对峙的概念基点。本文追溯了量子概念出现的历史画面,指出时量子概念引发的两种关于量子与实在之间关系的理解,并从语境方法论的教义对量子概念赋予其实在性。     

使用PC1D 5.9模拟高效单晶硅太阳能电池

介绍了使用PC1D 5.9软件模拟高效单晶硅太阳能电池的方法。通过建立太阳能电池的结构模型和参数模型,在模拟的电池测试环境下,仿真得到太阳能电池的电压-电流曲线和量子效率曲线,并根据太阳能电池的理论,计算填充因子和转换效率的值。     

Quantum mechanics and the postmodern in one country

Abstract

The orthodox interpretation of Quantum Mechanics was banned in the Soviet Union in 1947, an episode usually glossed as another illustration of repressive Soviet science. This paper argues that the roots of this ban should be located at a much deeper level, in a tension existing between the ‘postmodern’ form of orthodox Quantum Mechanics and an ideology of modernization. In the West a similar ideological tension had a different result: when the occasion demanded, the orthodox interpretation was covertly exchanged for an agnosticism about metaphysical matters, and potential areas of conflict with the principles of modernization were thus defused. The latter strategy benefited the orthodox interpretation, which enjoyed a virtual monopoly in the West from the 1940s through to the 1960s. Using the Freudian notions of ‘transference’ and ‘disavowal’, I explain why the ideological tension with modernization was resolved differently in the West and in the Soviet Union.     

Religion,social milieu,and the contraceptive revolution

This study examines how the social environment of religious congregations affects the spread of contraceptive use in developing contexts, using Mozambique as a case study. Analysis of qualitative data collected in urban areas of that country in 1998-99 and of the data from the 1997 Mozambique Demographic and Health Survey suggests that, in urban areas, the environment of more socioculturally diverse and inclusive Roman Catholic and mission-based Protestant congregations is more propitious to the spread and legitimization of modern contraception than the milieu of smaller, relatively homogeneous, independent churches. In rural areas, however, sociocultural diversity within and across different religious denominations is minimal, and membership in any formal congregation offers an advantage in contraceptive learning.     

Taub-NUT黑洞的统计熵

避开求解波动方程的困难,利用量子统计的方法,直接计算轴对称Taub-NUT黑洞背景下玻色场和费米场的配分函数.然后利用改进的砖墙方法——膜模型,计算黑洞背景下的玻色场和费米场的熵.计算表明,黑洞的熵与视界面积成正比的结论只有在薄膜的厚度远小于截断因子或两者为同阶无穷小时成立,当无穷小薄膜的厚度远大于无穷小截断因子时,黑洞的熵有一个对数发散项,黑洞熵不再与视界面积成正比.