We demonstrate a production of large-area ${}^{87}\mathrm{Rb}$ Bose-Einstein condensates (BECs) using a non-Gaussian optical dipole trap (ODT). The ODT is formed by focusing a symmetrically truncated Gaussian laser beam, and it is shown that the beam clipping causes the trap geometry to be elongated and flattened along the beam axis direction. In the clipped-Gaussian ODT, an elongated, highly oblate BEC of ${}^{87}\mathrm{Rb}$ is generated with a length and width of approximately 470 and $130\mu \mathrm{m},$ respectively, where the condensate healing length is estimated to be $\xi \approx 0.25\mu \text{m}$ at the trap center. The ODT is characterized to have a quartic trapping potential along the beam axis and the atom density of the condensate is uniform within 10% over $1000\xi$ in the central region. Finally, we discuss the prospect of conducting vortex shedding experiments using the elongated condensate.

中文翻译：

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剪切高斯光偶极子阱中的大面积 Rb87Bose-Einstein 凝聚

我们展示了大面积的生产 ${}^{87}铷$玻色-爱因斯坦凝聚 (BEC) 使用非高斯光偶极子阱 (ODT)。ODT是通过聚焦对称截断的高斯激光束形成的，并且表明光束剪裁导致陷阱几何形状沿光束轴方向被拉长和变平。在剪切高斯 ODT 中，一个细长的、高度扁圆的 BEC${}^{87}铷$ 生成的长度和宽度约为 470 和 $130\mu \mathrm{米},$ 分别，其中冷凝水愈合长度估计为 $\xi \approx 0.25\mu \text{米}$在陷阱中心。ODT 的特点是具有沿束轴的四次俘获势，并且凝聚物的原子密度在 10% 以上的范围内是均匀的。$1000\xi$在中部地区。最后，我们讨论了使用细长冷凝物进行涡流脱落实验的前景。