查询词典 squeezing

In this paper, quantum theory, the use of time evolution operator obtained by the first method for the system density operator of any time, and atomic reduced density matrix, and the atomic dipole squeezing conditions, numerical study of the mixed state -type atom of the three-level with single-mode optical field coherent interaction of atomic dipole squeezing effect.

本文采用全量子理论，运用时间演化算符方法先求出所求系统任意时刻的密度算符，和原子的约化密度矩阵，以及原子偶极压缩的条件，数值计算地研究了混合态型3能级与单模相干光场相互作用时原子的偶极压缩效应。

The main research contents and results are given as follows:(1) Principles and characteristics of different types of polarization controllers are analyzed, the compare of the difference of these polarization controllers are discussed based on them, drawn a conclusion that the polarization controller which based on squeezing fiber and has variable delay quantity are suitable for high speed optical communication system.(2) The reset principle of the typical four channel polarization controller which is based on squeezing fiber is analyzed, and the design of its concrete reset scheme is given based on them. The reset process and the corresponding operation list are given in detail.(3) The systematical experiment is made when the typical four channel polarization controller is put into the PMD compensator. The experiment result showed that the channel which needs reset can efficiently return to the mean place, and the effect of reset was good, it didn't cause any badness infection on PMD compensation.(4) A new type optical signal time-domain depolarizer is given, and a new PMD compensate method is given based on it.

由此得出延迟量可变型光纤挤压型偏振控制器适用于高速光通信系统的结论；(2)具体分析了典型的四通道光纤挤压型偏振控制器的复位原理，并在此基础上对其进行了具体复位方案的设计，给出了各种情况下的详细复位流程和相应的复位操作列表；(3)将四通道光纤挤压型偏振控制器应用于偏振模色散补偿器中进行系统实验，实验结果表明，需要复位的通道能有效地回到中间值，复位效果良好，且复位未对PMD补偿产生不良影响；(4)设计了一种新型的光信号时域退偏器，并基于该退偏器提出了一种新型的偏振模色散补偿方法。

Finally, by means of time evolution operator and numerical calculations, the time evolution of the atomic population, the atomic dipole squeezing, the time evolution of the squeezing and coherence properties of the light in the system of the two identical two-level entangled atoms interacting with the coherent optical field have been studied.

论文的第三部分工作是采用时间演化算符和数值计算方法，研究了两全同二能级纠缠原子与相干态光场相互作用过程中，原子布居、原子偶极压缩、光场的二阶相干和光场压缩性质的时间演化特性。

Open a spile , start an electric control valve motor when the job,control valve push in cam circular disc lower open up, lotus seed is followed by pressure to damaged shell knife , shell is cut apart thereupon and flesh is parted from the lotus for on causing a device to fall onto the squeezing claw squeezing a wheel under lotus seed classics, in squeezing a wheel rotating.

工作时，打开插板，启动电动机，控制阀在凸轮圆盘的推动下打开，莲子经下引装置落到挤压轮的挤压爪上，在挤压轮转动中莲子被压向破壳刀轨，于是壳被切开并与莲肉分离。关键的时候翻译不出来，大家帮忙先谢谢哈

Open a spile , start an electric motor when the job,control valve push in cam circular disc lower open up, lotus seed is followed by pressure to damaged shell knife , shell is cut apart thereupon and flesh is parted from the lotus for on causing a device to fall onto the squeezing claw squeezing a wheel under lotus seed classics, in squeezing a wheel rotating.

工作时，打开插板，启动电动机，控制阀在凸轮圆盘的推动下打开，莲子经下引装置落到挤压轮的挤压爪上，在挤压轮转动中莲子被压向破壳刀轨，于是壳被切开并与莲肉分离。关键的时候翻译不出来，大家帮忙先谢谢哈

It is found that amplitude-squared squeezing can be created by 4-photon unitary operator S4 acting on the vacuum state and this shows that the amplitude-squared squeezing can be created by 4-photon unitary operator S4 acting on the vacuum state and this shows that the amplitude-squared squeezing is a new nonclassical effect of light field which is independent of the second order squeezing, antibunching and sub-poisson statistics.

发现4个光子么正算符S4对真空态的作用可以产生振幅平方压缩，这表明振幅平方压缩是一种独立于二阶压缩、反聚束以及亚泊松统计分布的新的光场非经典效应。标签 K光子么正算符相干态真空态振幅平方压缩 K-photon unitary operator coherent state vacuum state amplitudesquared squeezing

Using the method of numeral computation,we explore transient behav-iors for KPAS,i.e,the degree of squeezing as a function of the initial intensity 〓at some time 〓,discovering that squeezings of k≥2 are remarkably different fromordinary squeezing mainly in the degree and scope of squeezing.

接着运用数值计算的方法，研究了KPAS的瞬时行为，即压缩程度在某一时刻τ随场的初始强度〓的变化，发现普通压缩与k≥2的压缩之间存在着显著的差别，主要体现在压缩的程度与范围两方面。

The results show that the number of the squeezed atomic dipoles is decided by the coherence of the atom, the direction of the quantum information entropy squeezing is decided by the phases of the field and the atom, and the quantum information entropy squeezing is a precision tool for the squeezing of the atom, especially when the atom is in the eigenstates of the dipole operators.

结果表明：原子偶极矩分量出现信息熵压缩的数目依赖于原子的分布角；信息熵压缩的方向由原子和场的位相决定；量子信息熵是原子压缩的精密量度工具，尤其适合于原子处在偶极矩算符的本征态时压缩情况的描述。

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。

There are three reasons for people's extensive interest in spin squeezing. Firstly, the spin squeezing is an effective method to overcome the limit in precision improvement set by Heisenberg Uncertainty Principle. Secondly, because of the relationship between spin squeezing and entanglement, the research in spin squeezing is of importance for quantum information. Lastly but not the least, the entanglement is one of fundamental physics problems, so research in thespin squeezing has both practical and theoretical significance.

论文摘要：自旋压缩的研究受到广泛关注源于三方面的原因：海森堡不确定关系的普遍存在是量子测量器件精度提高的最根本障碍，如何抑制它对精度的影响有着巨大的应用前景；自旋压缩与量子纠缠的密切关系使得自旋压缩的研究对量子信息有着重要的意义；另外，量子纠缠是物理有待探索的基本问题之一，所以对自旋压缩的研究既有应用方面的意义，也有着基本理论方面的意义。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。