查询词典 quantum physics

As we know, if one mode of the electromagnetic field is prepared in a squeezed state, the quantum fluctuation of one of its quadrature components can be lower than that of the corresponding part in a coherent state and that of the other is higher, and we can tune the signal-to-noise ratios of its quadrature components: one of the quadratures can be used to absorb the quantum-mechanical noise, while the other one serves to transmit an extremely well-defined signal.

由于压缩态中光场某一分量的量子涨落可以小于相干态中的量子涨落，即可以小于量子涨落的最小值，因此可以用来改变信号传递的信噪比，从而在低噪声通讯、弱信号探测、高精密测量等方面具有重要的应用前景。

At the same time, we studied the influence of quantum interference on the squeezing spectrum of the resonance fluorescence emitted from a V-type three-level atom and a -type four-level atom which are driven by coherent fields. We showed that quantum interference can greatly enhance squeezing in the components of phase quadratures at atomic frequency and change the squeezing spectrum .

同时，我们还研究了量子干涉对V型三能级和型四能级原子共振荧光压缩谱的影响，结果表明，量子干涉可显著加强原子跃迁频率分量的相位压缩效应和改变压缩谱的形状。

Two interferometric complementarities—between path distinguishability and the visibility of single-particle interference fringes and between the visibilities of one- and two-particle interference fringes— have been experimentally testified in NMR macroscopical ensemble, which is the experimental demonstration of quantum properties of NMR ensemble system. Meanwhile, the experimental results also provide the quantum mechanical foundation.

在宏观的NMR系综中，实验验证了两种干涉互补性：量子态演化的路径可区分度和单粒子干涉条纹可见度以及单粒子干涉条纹可见度和两粒子干涉条纹可见度之间的互补原理，这是NMR系综量子特性的实验演示，为NMR量子信息处理提供了量子力学基础。

We employ the model Hamiltonian and the method of exact diagonalization tostudy the quantum behaviors of four- and five-electron quantum dots in magnetic fieldswith negligible Zeeman effect.

论文采用模型哈密顿量和精确对角化方法研究了无塞曼效应( Lande g因子为0)情况下，包含四个和五个电子的量子点在磁场下的量子行为。

Week 15 Wave function, Schrodingger equation, infinite deep potential well in one dimension. Spin of electron, forth quantum number, description of hydrogen atom with quantum mechanics, Pauli exclusion principle, shell distribution of electrons out of atomic nucleus.

第15周波函数；薛定谔方程；一维无限深势阱；氢原子的定态薛定谔方程和求解的主要步骤；解的物理意义；电子的自旋-第四个量子数；氢原子的量子力学描述；泡利不相容原理；元素原子核外电子的壳层分布。

As for the idea that the quantum can emerge from relativity, Bousso recently derived the most famous formula of quantum mechanics, the Heisenberg uncertainty principle, from the holographic limit.

至于量子源自相对论的说法，布索最近由全像极限推导出了量子力学最有名的公式──海森堡的测不准原理。

The spectral theory of graph is not only an important area in graph theory but also an active topic. There are extensive applications in the fields of quantum chemistry, physics, computer science, communication network and information science.

近半个世纪以来，谱图论形成发展成为图论研究的重要领域之一，也是一个非常活跃的研究方向，它在量子化、物理、计算机科学、通信网络及信息科学中均有广泛的应用。

Hydrogen and hydrogen-like ions are idea system to study atomic physics and quantum mechanics.

氢及类氢离子是原子物理和量子力学研究的理想体系。

Quantum mechanics, which evolved in the early nineteen-twenties, had its initial thrust in the area of atomic physics.

本世纪20年代初期发展起来的量子力学，其最初取得的突破是在原子物理学的领域中。

The two revolutionary theories of relativity and quantum overthrew the absolute concept of time-space and static substance of classical physics, and question of time ultimate challenged the intellectual ideal ever held by mankind beyond the memory of men.

相对论和量子力学两大革命性理论推翻了经典物理学绝对时空观与静态物质观的基本预设，而时间终结问题的提出，是对人类有始以来曾经拥有的精神理想的重大挑战。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。