矩形槽浅水表面波的二次谐波共鸣*

本文用多重尺度微扰技术研究了矩形槽中浅水表面波的二次谐波共鸣现象.结果表明,波的包络仅与时间慢变量有关.作者严格地求解了波包络方程,并对结果进行了讨论.     

高功率激光光学元件面形参数表征

 针对神光-Ⅲ原型装置使用的光学元件,基于国内光学元件加工现状,结合空间频段的概念,对高功率固体激光驱动器所需光学元件不同的面形评价参数进行了阐述。结合对激光远场焦斑的影响,对面形评价参数的重要性进行了举例说明。提出了面形的综合评价方式,全面界定面形各项评价参数,对光学元件的评价具有一定的参考价值。     

Quantum Squeezing of Matter-Wave Solitons in Bose–Einstein Condensates

We investigate the quantum squeezing of matter-wave solitons in atomic Bose–Einstein condensates. By calculating quantum fluctuations of the solitons via solving the Bogoliubov–de Gennes equations, we show that significant quantum squeezing can be realized for both bright and dark solitons. We also show that the squeezing efficiency of the solitons can be enhanced and manipulated by atom–atom interaction and soliton blackness. The results reported here are beneficial not only for understanding q...