tensor polarization

The fourth rank polarization tensor and the helicity amplitudes ofγ-γscattering via charged scalar meson loops in some non-standard models are calculated.

计算了荷电标量介子的圈图对光子与光子散射的四阶极化张量和圆极化散射振幅的贡献，得到了它们依赖于三个超越函数Ｂ（ｕ），Ｔ（ｕ）和Ｉ（ｕ，ｖ）的精确解析表达式。

The polarization tensor is calculated with the random phase approximation in the framework of finite temperature field theory.

在有限温度场论下,首先用无规相近似方法计算出极化张量。

3μm wavelength was measured,and the element χ(3)xyxy of third-order nonlinear susceptibility tensor χ(3) was calculated.

3μm波长处,基于克尔效应和弗朗兹-凯尔迪什效应的电致双折射,进而计算出三阶非线性极化率张量(χ3)的分量x(χy3x)y。