量子力学中不确定关系的探讨

给出了不确定关系的一些具体的讨论及相关的例子.     

基于EPR对的多比特量子隐形传态方案

提出了一种多比特未知量子态的隐形传送方案.方案中,用EPR对纠缠态的直积态来传输一个未知信息粒子的量子态,通过N次联合测量与么正操作,实现N比特未知量子态的传输,与单粒子量子态传输相比,多比特量子态可以传送更多信息.     

量子力学中的么正矩阵

对量子力学中的几种具有代表意义的么正矩阵的性质作详细的讨论。     

Classical mechanics and quantum mechanics: an elementary approach to the comparison of the two viewpoints

Summaries

English

The relationship between classical mechanics and quantum mechanics is illustrated by considering how we form the images of moving objects. Brownian motion is an helpful example because it can be analyzed in two related, but different frames which show how the images we construct depend on the conditions of our observation and on some intrinsic characters of the observed objects.     

Time and energy operators in quantum mechanics

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量子力学中的完全性关系在数学和色度学中的应用

本文运用量子力学中的完全性关系分析了数学中整数的构成和色度学中颜色的合成问题,证明了完全性关系在其它领域也有着广泛的应用,从而有助于进一步研究数的构成和线性展开以及颜色、光谱的合成和分解问题．     

分离变量法在量子力学中的应用

分离变量法是量子力学中求解问题时最常用的方法之一.本文在分析分离变量法特性的基础上阐明了它在量子力学中的应用,以便于教师和学生在教与学的过程注意总结量子力学的基本特点与方法.     

爱因斯坦相对论的意义--纪念狭义相对论创立100周年(1905-2005)

根据广义相对论 ,爱因斯坦对万有引力的本质给出了一种解释 :由于物质的存在和物体的运动使时间空间变得不均匀 ,即时间空间发生弯曲 ,因而产生万有引力。广义相对论进一步揭示了物质运动与时间空间的相互联系。近年来 ,由于脉冲星 ,即高速旋转的中子星的发现 ,以及探测和研究“黑洞”成为热门 ,广义相对论再次成为科学界注意的中心。广义相对论成了现代宇宙论所不可缺少的理论基础。新的观测表明 :在现代天文学所观测到的宇宙世界 ,即一百多亿年和一百多亿光年的时空尺度内 ,表现出许多共同的普遍的整体的特征。很有可能人类目前观测到的宇…     

爱因斯坦相对论的意义--纪念狭义相对论创立100周年(1905-2005)

爱因斯坦(Albert Einstein,1879-1955)的 相对论,已经成为当今每一个人应当多少了解一 点的知识。除了物理学专业工作者以外,在研究 自然辩证法中,关于自然观、科学观、方法论,都 需要涉及相对论的知识,例如,时间空间,物质运 动,理想实验,探索性演绎法,等等。20世纪人类 开始使用和控制巨大的核能,其理论基础就是相 对论的著名的质能关系式(E=mc~2),这是生活 在20世纪的人们都应当具备的常识。因此,了解     

Hans bethe, quantum mechanics, and the lamb shift

An elementary derivation of the Lamb Shift, as originally given by Hans Bethe, is attempted, with a short historical background on the evolution of QED since the beginning of the last century. The treatment is for a non-relativistic electron, in keeping with Bethe’s proverbial insight into the problem, which renders irrelevant the effect of the electron spin on the problem. The Kramer idea of renormalization is implemented through a simple subtraction of the self-energy of a free electron from that of the electron bound in a hydrogen atom. A N Mitra has had a long teaching service from 1955 to 1994 when he retired from Delhi University as INSA Einstein Professor of physics. He spent a year (1995) as visiting professor at NIAS (Bangalore). Since then he has been working as a free-lance writer-cum-researcher in physics, with periodic publications on scientific matters of current interests. Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations.     

相对论与量子力学的关系及理论的发展

相对论和量子力学之间的关系,既是密切联系的,有时又彼此不相容,特别是测不准关系和光速不变.由此论述了超弦、环等量子引力理论.最后论证了由D irac负能态推导出的负物质是一种暗物质的可能性.     

Einstein as armchair detective: The case of stimulated radiation

Einstein was in many ways like a detective on a mystery trail, though in his case he was on the trail of nature’s mysteries and not some murder mystery! And like all good detectives he had a style. It consisted of taking facts that he knew were correct and forcing nature into a situation that would contradict this established truth. In this process she would be forced to reveal some new truths. Einstein’s 1917 paper on the quantum theory of radiation is a classic example of this style that enabled him to predict the existence of stimulated radiation starting from an analysis of thermodynamic equilibrium between matter and radiation.     

Einstein as armchair detective: The case of stimulated radiation

Einstein was in many ways like a detective on a mystery trail, though in his case he was on the trail of nature’s mysteries and not some murder mystery! And like all good detectives he had a style. It consisted of taking facts that he knew were correct and forcing nature into a situation that would contradict this established truth. In this process she would be forced to reveal some new truths. Einstein’s 1917 paper on the quantum theory of radiation is a classic example of this style that enabled him to predict the existence of stimulated radiation starting from an analysis of thermodynamic equilibrium between matter and radiation.     

这个时代有点儿怪

历史长河中,矛盾充斥在我们的周遭:楼房变高了,人的性情却急躁了;道路变宽了,人的思想却狭隘了。我们花费的多了,拥有的却少了;我们购买的多了,享受的却少了。我们拥有的房子更大了,家庭却小了;条件更便利了,时间却少了。学位多了,却缺少见识;知识增了,却缺乏判断力。专家多了,问题     

Einstein—Maxwell方程的新解

本文给出了一种新的生成技术,建立了一个新的生成解定理。根据此定理。可以由任何一个已知的静态真空解生成一个新的电磁真空解,并从Schwarzcdild解出发生成了一新解。     

爱因斯坦对物理学发展的贡献

爱因斯坦是一位对科学发展有杰出贡献的伟大物理学家，他一生的贡献是多方面的．他深入地研究了布朗运动；提出光量子概念，创立了光辐射量子理论，成功地解释了光电效应；创立了狭义相对论和广义相对论等等．所做出的贡献使他成为现代物理学的奠基者之一．     

在量子力学课程教学中培养学生的创造性思维

量子力学作为现代物理学的基础课程之一,其中包含了很多观念上的革新和方法上的突破.从微观粒子波粒二象性本质的确立、波函数假设和薛定谔方程的提出、电子自旋假设的引入和对应原理的作用等方面进行了详细的分析,并从师生两个方面就课程教学中如何培养学生的创造性思维提出了一些具体的要求.