We demonstrate the arbitrary control of the density profile of a two-dimensional Bose gas by shaping the optical potential applied to the atoms. We use a digital micromirror device (DMD) directly imaged onto the atomic cloud through a high resolution imaging system. Our approach relies on averaging the response of many pixels of the DMD over the diffraction spot of the imaging system, which allows us to create an optical potential with an arbitrary intensity profile and with micron-scale resolution. The obtained density distribution is optimized with a feedback loop based on the measured absorption images of the cloud. Using the same device, we also engineer arbitrary spin distributions thanks to a two-photon Raman transfer between internal ground states.

我们通过塑造应用于原子的光势来证明对二维 Bose 气体的密度分布的任意控制。我们使用通过高分辨率成像系统直接成像到原子云上的数字微镜设备 (DMD)。我们的方法依赖于在成像系统的衍射点上对 DMD 的许多像素的响应进行平均，这使我们能够创建具有任意强度分布和微米级分辨率的光学势。获得的密度分布通过基于云的测量吸收图像的反馈回路进行优化。由于内部基态之间的双光子拉曼转移，我们还使用相同的设备设计了任意自旋分布。