查询词典 photon

In this thesis, an efficient scheme of generating single photon with SPDC is presented, and the important application in quantum key distribution is also introduced.

本文主要提出了一种利用自发参量下转换获得高效单光子源的方案，介绍了高效单光子源在量子密钥分配的重要应用，并提出基于这种单光子源实现受控非门的理论方案。

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。

Two-photon interference in type I SPDC with femtosecond pulses

本论文在实验上取得的主要成果有

A theoretical scheme of generating high efficiency single photon using multi-dots delay detection in the process of SPDC is presented, by which the enhancement of the efficiency of controlled not gate is also studied.

二、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的方法获得高效单光子源的方案，并基于它提高了实现受控非门的效率。

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。

Ray laser is widely used in many fields such as, astronomy, microscopy, laser weapon, and spectrology because of its short wavelength and high energy in each photon.

x射线激光以其波长短，单光子能量高的特点广泛应用在很多的方面，例如天文学、显微镜、激光武器、光谱分析学等等。

Our conclusion is : For general transport equation and some special transport equations (slab geometry, spherical symmetry, pillar symmetry) we can evaluate some relevant physical quantities and geometrical properties from the exiting photon flux. The method we will use is to transform the transport equation into integral equation by integrating it along its characteristics, then we prove the nonlinear operator K is monotone and continuous with respect to its arguments and obtain the existence of K~-1. Consequently, we can evaluate some relevant physical quantities and geometrical property of the medium.

我们得到的结论是：无论对于一般的迁移方程，还是当介质具有某种对称性时(板对称、球对称、柱对称)的迁移方程，我们都可以根据泄漏的光子流估计介质各种相关物理量和几何特性，所用方法都是将迁移方程通过沿特征线积分转化为积分方程的形式，然后证明非线性算子K关于自变量的单调性和连续性，从而得到逆算子K~(-1)存在，进而达到估计介质各种相关物理量和几何特性的目的。

So the present study was taken to compare the differences in the mechanisms of dissipating excess light energy in cucurbit crops and to study the differences in both the ROS metabolism in root system and the photosynthesis among six cucurbit crops with different temperature tolerance growing at different root-temperatures. The main results are as follows: 1、The species specific response of three cucurbit crops with different heat-tolerance: warm-adapted cucumber, heat-tolerant sponge gourd and heat-sensitive figleaf gourd to diurnal changes in air temperature and irradiance intensity were investigated in a typical summer sunny day. Three cucurbit species were compared using parameters in gas exchange, chlorophyll fluorenscence, photon allocation and photosynthetic electron flux.

因此，本试验以温度敏感性不同的瓜类作物为材料，研究了夏季自然条件下不同物种间在耗散过量光能的主要机制差异；探讨了它们对不同根际温度在根系活性氧代谢及地上部光合作用等方面的生理响应差异，所取得的主要结果如下： 1、在夏季晴天条件下，三种温度敏感性不同的瓜类作物：喜温的黄瓜，耐热性的丝瓜与热敏感的黑籽南瓜在气体交换、叶绿素荧光、光能分配及光合电子流对一天中温度与光照环境变化的响应上存在物种间差异和日变化特征。

The source model consists of a photon fluence grid that is composed of a matrix of square elements, and is located 20 cm underneath the linear accelerator target.

建立的源模型包含一个由方形网格元素组成的光子通量矩阵，定位于距离加速器靶下方20 cm处。

The two-photon absorption properties of 4,4′-bis stilbene synthesized recently are calculated at ab initio level.

对最近实验室合成的分子材料4，4＇二甲氨基二苯乙烯的双光子吸收特性在从头计算的基础上进行了理论研究。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新