光子

The experimental test of the photon rest mass is equal to verify the constancy of c , and any conclusive evidence of a finite mass for the photon will bring great influence on development of the whole physics .

对光子静止质量的实验检验，也是对光速不变性原理的一种检验，一旦实验证实光子具有静止质量，即使非常微小，整个物理学的框架将会发生革命性的变化。

To conduct such research a new experimental apparatus was established.With this setup the two-photon excitation spectra of Barium and one-photonexcitation spectra of Strontium Rydberg atoms were recorded and identified.The Stark spectra of Strontium atoms showed the "l-mixing" and "n-mixing"features. By changing laser wavelength and external electric field strengthsimultaneously, the scaled-energy spectra of Strontium 〓 Rydberg atomsat constant scaled-energy ε=-3.00,-2.50 and -1.88 were recorded for thefirst time. The experimental spectra were Fourier transformed and yielded therecurrence spectra.

主要工作包括：建立了一套用于外电场原子光谱研究的原子束实验装置；获得了Ba原子的双光子、Sr原子的单光子零场激发谱，并对各谱线进行了标识；进行了Sr原子电场Stark效应研究，观察到了低场时能级角量子数"l"混合区及高场时主量子数"n"混合区的存在；首次获得了Sr原子在标度能量ε=-3.00、-2.50及-1.88时〓高Rydberg态电场标度能谱及傅立叶变换后的电子回归谱。

The best wayto produce single-photon state is the process of SPDC in the nonlinear crystal.

下转换光子作为更严格的单光子源，有必要在实验上进行深入分析。

Our experiment is first time toanalyze the interference of single-photon produced by femtosecond-pulsed SPDC.

而对飞秒脉冲双光子纠缠中的单光子干涉实验分析尚属首次。

The generating origin of the light field with SPDC expounded with the interaction of the pumping photons with the nonlinear crystals.

分析了单色泵浦光子流和量子真空噪声对非线性晶体的综合作用，从泵浦光与非线性晶体的相互作用过程解释了自发参量下转换光场的产生根源，推导了SPDC双光子态的数学表达式，并给出其几率解释

The creative works are as follows: 1. We show a scheme to generate high efficiency single photon via multi-dots delay detection with SPDC.

在这些研究工作中，属创新性工作的有两点： 1、提出了一种利用自发参量下转换过程采用多点延时探测触发获得高效单光子源的方法，可以利用它来实现基于单光子的量子密钥分配方案和量子计算中的量子逻辑门。

The spectral lag distribution of the short GRBs is significantly different from that of the long GRBs.

排除统计涨落效应，仍有17％的短暴具有负的光谱时滞，即高能光子滞后于低能光子。

Through detailed calculation and analysis of the dispersion characteristic of the noble metals like Au and Ag, we found that the group velocity combined with the group refractive index can change from negative to positive with increase of the photons energy in the visible Drude region and has the spectral property which is in agreement with the experimental results obtained in this work.

通过对贵金属Au和Ag的光学常数的色散特性分析和数值计算，发现在可见光的Drude光谱区，表征光子能量传播方向的群速度和群折射率的值会随光子能量的增大而发生从负到正的改变，这与本论文研究的实验测量和观察结果相符合。

The results show that the entanglement of field-atom reduced to a stationary value with time evolution and the entanglement between two modes increase to another stationary value with intrinsic decoherence, and the values only depend on the two-mode photon number and mean photon number.

结果表明，存在内禀退相干时，随着时间的演化，场一原子纠缠逐渐减小到一个确定值，而模间纠缠逐渐增大到一个确定值，两者演化的最终值只取决于双模光子数差和平均光子数，而与内禀退相干因子无关。

The geometry, electronic structures and electronic spectra of trans stilbene derivatives are systematically studied by PM3 and INDO/CI methods.

分子在强激光束作用下，能同时吸收两个光子的现象称为双光子吸收。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。