寻找囚禁在光腔中的玻色-爱因斯坦凝聚体的八重准晶

Searching for octave quasicrystals of Bose-Einstein condensate trapped in optical cavities

准晶是一种拥有长程序但不具有周期性结构的一种物质.实验上通过将玻色-爱因斯坦凝聚体(BEC)放置在一个由四个光学腔组成的系统中,通过四个腔中激光照射在凝聚体上从而得到具有八重旋转对称性的准晶.本文结合虚时演化方法和分步傅里叶法从理论上得到了八重准晶体.我们通过这种方法可以实现更为复杂的晶体结构,从而为将来探索新物质提供了可能.

A quasicrystal is a substance that has a long-range ordered but not periodic structure.The quasicrystals with eight-fold rotational symmetry were obtained experimentally by loading the Bose-Einstein condensate(BEC)in a system consisting of four optical cavities and irradiating the condensate with laser in the cavities.In this paper,an eight-fold quasicrystal is theoretically obtained by combining the imaginary-time propagation and the split-step Fourier method.With this method,we can achieve more complex crystal structures,which provides the possibility for exploring new substances in the future.