目的研究四态叠加多模泛函叠加态光场的高次振幅压缩特性。

Aim To study the higher-power amplitude squeezing properties of the four-state superposition multimode functional superposition state light field.

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利用光滑模和K -泛函给出了一类多元三角多项式算子同时逼近的正逆定理。

Using the modulus of smoothness and K-functional, direct and inverse theorems of simultaneous approximation for a kind of multivariate trigonometric polynomial operators are established.

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基于密度泛函微扰理论(DFPT)结合模守恒赝势方法进行晶格动力学模拟。

Based on density functional perturbation theory (DFPT) and combined with the norm-conserving pseudopotential method, the lattice dynamic simulation is presented.

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