相消干涉

在QED框架下，最初由Landau，Pomeranchuk和Migdal考虑过快速带电粒子经过多次散射之后由光子辐射导致的能量损失，给出了相消干涉的LPM效应。

The radiative energy loss of a charged fast particle which undergoes successive scattering has been studied in the framework of QED by Landau , Pomeranchuk and Migdal long ago , the LPM destructive interference effect is demonstrated .

在这种情况是相长干涉还是相消干涉？

In this case is it constructive or destructive interference ?

EIT是一项具有重大意义和实用价值的技术，它可以通过相消干涉使得介质对共振探测光的吸收和色散特性发生显著变化，从而可以实现无吸收的大色散。

The EIT method is a powerful technique with significance and practicability that can make the dispersive and absorptive properties of optical medium modified dramatically , i.e. , make the medium having large dispersion without the resonant absorption by means of destructive interference .

四个部分相干点源的完全相消干涉特性

Complete destructive interference of four partially coherent point sources

我们也可以讨论，相消干涉的反键轨道。

We can also talk about anti-bonding orbitals where we have destructive interference .

这种情形称作相消干涉。

This situation is called destructive interference .

这里是相消干涉。

We have destructive interference here .

如果我们减去干涉项，我们得到的就是相消干涉。

So if we 're subtracting the interference term , what we have here now is destructive interference .

我们证明了利用体系的双暗态和多光子相消干涉可大大消除介质对泵浦光场的吸收。

We have demonstrated that the absorption of pump field could be suppressed by using a double-dark resonance and multi-photon destructive interference .

就像我们看到水波，和光波的相消干涉，我们也可以看到轨道的相消干涉。

Just like we see destructive interference with water waves or with light waves , we can also see destructive interference with orbitals .

尽管在腔场中存在自发辐射，但在腔场形成的一对集合模的起伏中仍会出现相消干涉。

Although spontaneous emission is fed into the cavity fields , destructive interference occurs in the fluctuations of a pair of collective modes .

如果你们比较s轨道和下面这叶，它们正负号相反，所以它们相消干涉。

If you compare the s orbital with the bottom lobe , these have a different sign so they 're going to destructively interfere .

在这种情形下，波就互相抵消被称为“异相”，这种状况叫做相消干涉。

In that case the waves cancel each other and are said to be " out of phase . " That situation is called destructive interference .

当相邻缺陷沿周长方向的距离与费米波矢长度不匹配时，体系的量子电导因为波函数发生相消干涉而被极大的降低。

The quantum conductance can be largely reduced by interference when there is mismatch between the Fermi wave vector and the atomic lattice along the circumferential direction .

结果表明，一定条件下，可出现完全相消干涉，并存在光强和光谱相干度的相位奇点。

It is found that the complete destructive interference in the four-pinhole interferometer may appear , and there may exist phase singularities of intensity and spectral degree of coherence .

我们研究了双光子干涉中所体现的互补性，并针对两个具体的双光子干涉方案，分别对相消干涉和相长干涉给出互补性的定量关系式。

We have studied the complementarity in two-photon interference . We give quantitative complementary equations to two specific examples of two-photon interference ; both examples are discussed according to constructive and destructive interference respectively .

定量讨论了置于椭圆与双曲线焦点上的两个相干波源在椭圆、旋转椭球面、双曲线以及旋转双叶双曲面上产生相长干涉与相消干涉的条件与分布。

This paper discusses the conditions and distributions of constructive interferences and destructive interferences when two interference wave sources on the focuses of an ellipse , a rotation ellipsoid , a hyperbola or a rotation hyperboloid .

使用3维时域有限差分算法模拟得到了纳米点阵非晶碳的反射光谱和波印廷矢量分布图，结果表明点阵的散射作用及散射光之间的相消干涉共同作用起到了增强减反的效果。

Reflective spectra as well as Poynting vector distribution map has been got through simulations base on 3D finite differential time domain ( FDTD ) algorithm , which shows that the scattering effect of the nano array and the interference of scattered light contributed to the enhancement of antireflection .

实验中实现了40Gb/s差分相移键控信号的解调，解调信号消光比为14.5dB，温度控制实现了输出结果的长时间稳定，并可在相长干涉和相消干涉之间转换。

In the experiment , 40 Gb / s DPSK signal was demodulated successfully , and the extinction of the demodulated signal is 14.5 dB . With the help of temperature control , the experimental results have a long-time stability and can be switched between constructive interference and destructive one .

相关干扰对旁瓣对消系统性能的影响具体一点讲，光束合并时进行相消性干涉，也就是光的波长互相抵消。

Effects of Coherent Jamming on the Performance of Sidelobe Canceller Specifically , they recombine destructively-that is , the waves cancel each other out .

具体一点讲，光束合并时进行相消性干涉，也就是光的波长互相抵消。光纤低相干干涉技术中光拍频噪声的分析与消除

Specifically , they recombine destructively-that is , the waves cancel each other out . The Analysis and Elimination of Optical Beat Noise in Fiber Low-coherence Interometry

有源噪声控制的基本原理是根据两列同频率、相位差固定的声波会发生相消性干涉。

Active Noise Control in accordance with the basic principles of the same two frequencies , the acoustic phase will be fixed in cancellation of interference .